diff --git a/hledger-web/static/js/jquery.flot.canvas.js b/hledger-web/static/js/jquery.flot.canvas.js
new file mode 100644
index 000000000..29328d581
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.canvas.js
@@ -0,0 +1,345 @@
+/* Flot plugin for drawing all elements of a plot on the canvas.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+Flot normally produces certain elements, like axis labels and the legend, using
+HTML elements. This permits greater interactivity and customization, and often
+looks better, due to cross-browser canvas text inconsistencies and limitations.
+
+It can also be desirable to render the plot entirely in canvas, particularly
+if the goal is to save it as an image, or if Flot is being used in a context
+where the HTML DOM does not exist, as is the case within Node.js. This plugin
+switches out Flot's standard drawing operations for canvas-only replacements.
+
+Currently the plugin supports only axis labels, but it will eventually allow
+every element of the plot to be rendered directly to canvas.
+
+The plugin supports these options:
+
+{
+    canvas: boolean
+}
+
+The "canvas" option controls whether full canvas drawing is enabled, making it
+possible to toggle on and off. This is useful when a plot uses HTML text in the
+browser, but needs to redraw with canvas text when exporting as an image.
+
+*/
+
+(function($) {
+
+	var options = {
+		canvas: true
+	};
+
+	var render, getTextInfo, addText;
+
+	// Cache the prototype hasOwnProperty for faster access
+
+	var hasOwnProperty = Object.prototype.hasOwnProperty;
+
+	function init(plot, classes) {
+
+		var Canvas = classes.Canvas;
+
+		// We only want to replace the functions once; the second time around
+		// we would just get our new function back.  This whole replacing of
+		// prototype functions is a disaster, and needs to be changed ASAP.
+
+		if (render == null) {
+			getTextInfo = Canvas.prototype.getTextInfo,
+			addText = Canvas.prototype.addText,
+			render = Canvas.prototype.render;
+		}
+
+		// Finishes rendering the canvas, including overlaid text
+
+		Canvas.prototype.render = function() {
+
+			if (!plot.getOptions().canvas) {
+				return render.call(this);
+			}
+
+			var context = this.context,
+				cache = this._textCache;
+
+			// For each text layer, render elements marked as active
+
+			context.save();
+			context.textBaseline = "middle";
+
+			for (var layerKey in cache) {
+				if (hasOwnProperty.call(cache, layerKey)) {
+					var layerCache = cache[layerKey];
+					for (var styleKey in layerCache) {
+						if (hasOwnProperty.call(layerCache, styleKey)) {
+							var styleCache = layerCache[styleKey],
+								updateStyles = true;
+							for (var key in styleCache) {
+								if (hasOwnProperty.call(styleCache, key)) {
+
+									var info = styleCache[key],
+										positions = info.positions,
+										lines = info.lines;
+
+									// Since every element at this level of the cache have the
+									// same font and fill styles, we can just change them once
+									// using the values from the first element.
+
+									if (updateStyles) {
+										context.fillStyle = info.font.color;
+										context.font = info.font.definition;
+										updateStyles = false;
+									}
+
+									for (var i = 0, position; position = positions[i]; i++) {
+										if (position.active) {
+											for (var j = 0, line; line = position.lines[j]; j++) {
+												context.fillText(lines[j].text, line[0], line[1]);
+											}
+										} else {
+											positions.splice(i--, 1);
+										}
+									}
+
+									if (positions.length == 0) {
+										delete styleCache[key];
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+
+			context.restore();
+		};
+
+		// Creates (if necessary) and returns a text info object.
+		//
+		// When the canvas option is set, the object looks like this:
+		//
+		// {
+		//     width: Width of the text's bounding box.
+		//     height: Height of the text's bounding box.
+		//     positions: Array of positions at which this text is drawn.
+		//     lines: [{
+		//         height: Height of this line.
+		//         widths: Width of this line.
+		//         text: Text on this line.
+		//     }],
+		//     font: {
+		//         definition: Canvas font property string.
+		//         color: Color of the text.
+		//     },
+		// }
+		//
+		// The positions array contains objects that look like this:
+		//
+		// {
+		//     active: Flag indicating whether the text should be visible.
+		//     lines: Array of [x, y] coordinates at which to draw the line.
+		//     x: X coordinate at which to draw the text.
+		//     y: Y coordinate at which to draw the text.
+		// }
+
+		Canvas.prototype.getTextInfo = function(layer, text, font, angle, width) {
+
+			if (!plot.getOptions().canvas) {
+				return getTextInfo.call(this, layer, text, font, angle, width);
+			}
+
+			var textStyle, layerCache, styleCache, info;
+
+			// Cast the value to a string, in case we were given a number
+
+			text = "" + text;
+
+			// If the font is a font-spec object, generate a CSS definition
+
+			if (typeof font === "object") {
+				textStyle = font.style + " " + font.variant + " " + font.weight + " " + font.size + "px " + font.family;
+			} else {
+				textStyle = font;
+			}
+
+			// Retrieve (or create) the cache for the text's layer and styles
+
+			layerCache = this._textCache[layer];
+
+			if (layerCache == null) {
+				layerCache = this._textCache[layer] = {};
+			}
+
+			styleCache = layerCache[textStyle];
+
+			if (styleCache == null) {
+				styleCache = layerCache[textStyle] = {};
+			}
+
+			info = styleCache[text];
+
+			if (info == null) {
+
+				var context = this.context;
+
+				// If the font was provided as CSS, create a div with those
+				// classes and examine it to generate a canvas font spec.
+
+				if (typeof font !== "object") {
+
+					var element = $("
 
")
+						.css("position", "absolute")
+						.addClass(typeof font === "string" ? font : null)
+						.appendTo(this.getTextLayer(layer));
+
+					font = {
+						lineHeight: element.height(),
+						style: element.css("font-style"),
+						variant: element.css("font-variant"),
+						weight: element.css("font-weight"),
+						family: element.css("font-family"),
+						color: element.css("color")
+					};
+
+					// Setting line-height to 1, without units, sets it equal
+					// to the font-size, even if the font-size is abstract,
+					// like 'smaller'.  This enables us to read the real size
+					// via the element's height, working around browsers that
+					// return the literal 'smaller' value.
+
+					font.size = element.css("line-height", 1).height();
+
+					element.remove();
+				}
+
+				textStyle = font.style + " " + font.variant + " " + font.weight + " " + font.size + "px " + font.family;
+
+				// Create a new info object, initializing the dimensions to
+				// zero so we can count them up line-by-line.
+
+				info = styleCache[text] = {
+					width: 0,
+					height: 0,
+					positions: [],
+					lines: [],
+					font: {
+						definition: textStyle,
+						color: font.color
+					}
+				};
+
+				context.save();
+				context.font = textStyle;
+
+				// Canvas can't handle multi-line strings; break on various
+				// newlines, including HTML brs, to build a list of lines.
+				// Note that we could split directly on regexps, but IE < 9 is
+				// broken; revisit when we drop IE 7/8 support.
+
+				var lines = (text + "").replace(/
|\r\n|\r/g, "\n").split("\n");
+
+				for (var i = 0; i < lines.length; ++i) {
+
+					var lineText = lines[i],
+						measured = context.measureText(lineText);
+
+					info.width = Math.max(measured.width, info.width);
+					info.height += font.lineHeight;
+
+					info.lines.push({
+						text: lineText,
+						width: measured.width,
+						height: font.lineHeight
+					});
+				}
+
+				context.restore();
+			}
+
+			return info;
+		};
+
+		// Adds a text string to the canvas text overlay.
+
+		Canvas.prototype.addText = function(layer, x, y, text, font, angle, width, halign, valign) {
+
+			if (!plot.getOptions().canvas) {
+				return addText.call(this, layer, x, y, text, font, angle, width, halign, valign);
+			}
+
+			var info = this.getTextInfo(layer, text, font, angle, width),
+				positions = info.positions,
+				lines = info.lines;
+
+			// Text is drawn with baseline 'middle', which we need to account
+			// for by adding half a line's height to the y position.
+
+			y += info.height / lines.length / 2;
+
+			// Tweak the initial y-position to match vertical alignment
+
+			if (valign == "middle") {
+				y = Math.round(y - info.height / 2);
+			} else if (valign == "bottom") {
+				y = Math.round(y - info.height);
+			} else {
+				y = Math.round(y);
+			}
+
+			// FIXME: LEGACY BROWSER FIX
+			// AFFECTS: Opera < 12.00
+
+			// Offset the y coordinate, since Opera is off pretty
+			// consistently compared to the other browsers.
+
+			if (!!(window.opera && window.opera.version().split(".")[0] < 12)) {
+				y -= 2;
+			}
+
+			// Determine whether this text already exists at this position.
+			// If so, mark it for inclusion in the next render pass.
+
+			for (var i = 0, position; position = positions[i]; i++) {
+				if (position.x == x && position.y == y) {
+					position.active = true;
+					return;
+				}
+			}
+
+			// If the text doesn't exist at this position, create a new entry
+
+			position = {
+				active: true,
+				lines: [],
+				x: x,
+				y: y
+			};
+
+			positions.push(position);
+
+			// Fill in the x & y positions of each line, adjusting them
+			// individually for horizontal alignment.
+
+			for (var i = 0, line; line = lines[i]; i++) {
+				if (halign == "center") {
+					position.lines.push([Math.round(x - line.width / 2), y]);
+				} else if (halign == "right") {
+					position.lines.push([Math.round(x - line.width), y]);
+				} else {
+					position.lines.push([Math.round(x), y]);
+				}
+				y += line.height;
+			}
+		};
+	}
+
+	$.plot.plugins.push({
+		init: init,
+		options: options,
+		name: "canvas",
+		version: "1.0"
+	});
+
+})(jQuery);
diff --git a/hledger-web/static/js/jquery.flot.canvas.min.js b/hledger-web/static/js/jquery.flot.canvas.min.js
new file mode 100644
index 000000000..40c1051b3
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.canvas.min.js
@@ -0,0 +1,7 @@
+/* Javascript plotting library for jQuery, version 0.8.3.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/
+(function($){var options={canvas:true};var render,getTextInfo,addText;var hasOwnProperty=Object.prototype.hasOwnProperty;function init(plot,classes){var Canvas=classes.Canvas;if(render==null){getTextInfo=Canvas.prototype.getTextInfo,addText=Canvas.prototype.addText,render=Canvas.prototype.render}Canvas.prototype.render=function(){if(!plot.getOptions().canvas){return render.call(this)}var context=this.context,cache=this._textCache;context.save();context.textBaseline="middle";for(var layerKey in cache){if(hasOwnProperty.call(cache,layerKey)){var layerCache=cache[layerKey];for(var styleKey in layerCache){if(hasOwnProperty.call(layerCache,styleKey)){var styleCache=layerCache[styleKey],updateStyles=true;for(var key in styleCache){if(hasOwnProperty.call(styleCache,key)){var info=styleCache[key],positions=info.positions,lines=info.lines;if(updateStyles){context.fillStyle=info.font.color;context.font=info.font.definition;updateStyles=false}for(var i=0,position;position=positions[i];i++){if(position.active){for(var j=0,line;line=position.lines[j];j++){context.fillText(lines[j].text,line[0],line[1])}}else{positions.splice(i--,1)}}if(positions.length==0){delete styleCache[key]}}}}}}}context.restore()};Canvas.prototype.getTextInfo=function(layer,text,font,angle,width){if(!plot.getOptions().canvas){return getTextInfo.call(this,layer,text,font,angle,width)}var textStyle,layerCache,styleCache,info;text=""+text;if(typeof font==="object"){textStyle=font.style+" "+font.variant+" "+font.weight+" "+font.size+"px "+font.family}else{textStyle=font}layerCache=this._textCache[layer];if(layerCache==null){layerCache=this._textCache[layer]={}}styleCache=layerCache[textStyle];if(styleCache==null){styleCache=layerCache[textStyle]={}}info=styleCache[text];if(info==null){var context=this.context;if(typeof font!=="object"){var element=$(" 
").css("position","absolute").addClass(typeof font==="string"?font:null).appendTo(this.getTextLayer(layer));font={lineHeight:element.height(),style:element.css("font-style"),variant:element.css("font-variant"),weight:element.css("font-weight"),family:element.css("font-family"),color:element.css("color")};font.size=element.css("line-height",1).height();element.remove()}textStyle=font.style+" "+font.variant+" "+font.weight+" "+font.size+"px "+font.family;info=styleCache[text]={width:0,height:0,positions:[],lines:[],font:{definition:textStyle,color:font.color}};context.save();context.font=textStyle;var lines=(text+"").replace(/
|\r\n|\r/g,"\n").split("\n");for(var i=0;i index)
+                index = categories[v];
+
+        return index + 1;
+    }
+
+    function categoriesTickGenerator(axis) {
+        var res = [];
+        for (var label in axis.categories) {
+            var v = axis.categories[label];
+            if (v >= axis.min && v <= axis.max)
+                res.push([v, label]);
+        }
+
+        res.sort(function (a, b) { return a[0] - b[0]; });
+
+        return res;
+    }
+    
+    function setupCategoriesForAxis(series, axis, datapoints) {
+        if (series[axis].options.mode != "categories")
+            return;
+        
+        if (!series[axis].categories) {
+            // parse options
+            var c = {}, o = series[axis].options.categories || {};
+            if ($.isArray(o)) {
+                for (var i = 0; i < o.length; ++i)
+                    c[o[i]] = i;
+            }
+            else {
+                for (var v in o)
+                    c[v] = o[v];
+            }
+            
+            series[axis].categories = c;
+        }
+
+        // fix ticks
+        if (!series[axis].options.ticks)
+            series[axis].options.ticks = categoriesTickGenerator;
+
+        transformPointsOnAxis(datapoints, axis, series[axis].categories);
+    }
+    
+    function transformPointsOnAxis(datapoints, axis, categories) {
+        // go through the points, transforming them
+        var points = datapoints.points,
+            ps = datapoints.pointsize,
+            format = datapoints.format,
+            formatColumn = axis.charAt(0),
+            index = getNextIndex(categories);
+
+        for (var i = 0; i < points.length; i += ps) {
+            if (points[i] == null)
+                continue;
+            
+            for (var m = 0; m < ps; ++m) {
+                var val = points[i + m];
+
+                if (val == null || !format[m][formatColumn])
+                    continue;
+
+                if (!(val in categories)) {
+                    categories[val] = index;
+                    ++index;
+                }
+                
+                points[i + m] = categories[val];
+            }
+        }
+    }
+
+    function processDatapoints(plot, series, datapoints) {
+        setupCategoriesForAxis(series, "xaxis", datapoints);
+        setupCategoriesForAxis(series, "yaxis", datapoints);
+    }
+
+    function init(plot) {
+        plot.hooks.processRawData.push(processRawData);
+        plot.hooks.processDatapoints.push(processDatapoints);
+    }
+    
+    $.plot.plugins.push({
+        init: init,
+        options: options,
+        name: 'categories',
+        version: '1.0'
+    });
+})(jQuery);
diff --git a/hledger-web/static/js/jquery.flot.categories.min.js b/hledger-web/static/js/jquery.flot.categories.min.js
new file mode 100644
index 000000000..5bce588e3
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.categories.min.js
@@ -0,0 +1,7 @@
+/* Javascript plotting library for jQuery, version 0.8.3.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/
+(function($){var options={xaxis:{categories:null},yaxis:{categories:null}};function processRawData(plot,series,data,datapoints){var xCategories=series.xaxis.options.mode=="categories",yCategories=series.yaxis.options.mode=="categories";if(!(xCategories||yCategories))return;var format=datapoints.format;if(!format){var s=series;format=[];format.push({x:true,number:true,required:true});format.push({y:true,number:true,required:true});if(s.bars.show||s.lines.show&&s.lines.fill){var autoscale=!!(s.bars.show&&s.bars.zero||s.lines.show&&s.lines.zero);format.push({y:true,number:true,required:false,defaultValue:0,autoscale:autoscale});if(s.bars.horizontal){delete format[format.length-1].y;format[format.length-1].x=true}}datapoints.format=format}for(var m=0;mindex)index=categories[v];return index+1}function categoriesTickGenerator(axis){var res=[];for(var label in axis.categories){var v=axis.categories[label];if(v>=axis.min&&v<=axis.max)res.push([v,label])}res.sort(function(a,b){return a[0]-b[0]});return res}function setupCategoriesForAxis(series,axis,datapoints){if(series[axis].options.mode!="categories")return;if(!series[axis].categories){var c={},o=series[axis].options.categories||{};if($.isArray(o)){for(var i=0;i ax[1].max || y < ax[1].min || upper < ax[0].min || lower > ax[0].max)
+                            continue;
+                    if (err[e].err == 'y')
+                        if (x > ax[0].max || x < ax[0].min || upper < ax[1].min || lower > ax[1].max)
+                            continue;
+
+                    // prevent errorbars getting out of the canvas
+                    var drawUpper = true,
+                        drawLower = true;
+
+                    if (upper > minmax[1]) {
+                        drawUpper = false;
+                        upper = minmax[1];
+                    }
+                    if (lower < minmax[0]) {
+                        drawLower = false;
+                        lower = minmax[0];
+                    }
+
+                    //sanity check, in case some inverted axis hack is applied to flot
+                    if ((err[e].err == 'x' && invertX) || (err[e].err == 'y' && invertY)) {
+                        //swap coordinates
+                        var tmp = lower;
+                        lower = upper;
+                        upper = tmp;
+                        tmp = drawLower;
+                        drawLower = drawUpper;
+                        drawUpper = tmp;
+                        tmp = minmax[0];
+                        minmax[0] = minmax[1];
+                        minmax[1] = tmp;
+                    }
+
+                    // convert to pixels
+                    x = ax[0].p2c(x),
+                        y = ax[1].p2c(y),
+                        upper = ax[e].p2c(upper);
+                    lower = ax[e].p2c(lower);
+                    minmax[0] = ax[e].p2c(minmax[0]);
+                    minmax[1] = ax[e].p2c(minmax[1]);
+
+                    //same style as points by default
+                    var lw = err[e].lineWidth ? err[e].lineWidth : s.points.lineWidth,
+                        sw = s.points.shadowSize != null ? s.points.shadowSize : s.shadowSize;
+
+                    //shadow as for points
+                    if (lw > 0 && sw > 0) {
+                        var w = sw / 2;
+                        ctx.lineWidth = w;
+                        ctx.strokeStyle = "rgba(0,0,0,0.1)";
+                        drawError(ctx, err[e], x, y, upper, lower, drawUpper, drawLower, radius, w + w/2, minmax);
+
+                        ctx.strokeStyle = "rgba(0,0,0,0.2)";
+                        drawError(ctx, err[e], x, y, upper, lower, drawUpper, drawLower, radius, w/2, minmax);
+                    }
+
+                    ctx.strokeStyle = err[e].color? err[e].color: s.color;
+                    ctx.lineWidth = lw;
+                    //draw it
+                    drawError(ctx, err[e], x, y, upper, lower, drawUpper, drawLower, radius, 0, minmax);
+                }
+            }
+        }
+    }
+
+    function drawError(ctx,err,x,y,upper,lower,drawUpper,drawLower,radius,offset,minmax){
+
+        //shadow offset
+        y += offset;
+        upper += offset;
+        lower += offset;
+
+        // error bar - avoid plotting over circles
+        if (err.err == 'x'){
+            if (upper > x + radius) drawPath(ctx, [[upper,y],[Math.max(x + radius,minmax[0]),y]]);
+            else drawUpper = false;
+            if (lower < x - radius) drawPath(ctx, [[Math.min(x - radius,minmax[1]),y],[lower,y]] );
+            else drawLower = false;
+        }
+        else {
+            if (upper < y - radius) drawPath(ctx, [[x,upper],[x,Math.min(y - radius,minmax[0])]] );
+            else drawUpper = false;
+            if (lower > y + radius) drawPath(ctx, [[x,Math.max(y + radius,minmax[1])],[x,lower]] );
+            else drawLower = false;
+        }
+
+        //internal radius value in errorbar, allows to plot radius 0 points and still keep proper sized caps
+        //this is a way to get errorbars on lines without visible connecting dots
+        radius = err.radius != null? err.radius: radius;
+
+        // upper cap
+        if (drawUpper) {
+            if (err.upperCap == '-'){
+                if (err.err=='x') drawPath(ctx, [[upper,y - radius],[upper,y + radius]] );
+                else drawPath(ctx, [[x - radius,upper],[x + radius,upper]] );
+            } else if ($.isFunction(err.upperCap)){
+                if (err.err=='x') err.upperCap(ctx, upper, y, radius);
+                else err.upperCap(ctx, x, upper, radius);
+            }
+        }
+        // lower cap
+        if (drawLower) {
+            if (err.lowerCap == '-'){
+                if (err.err=='x') drawPath(ctx, [[lower,y - radius],[lower,y + radius]] );
+                else drawPath(ctx, [[x - radius,lower],[x + radius,lower]] );
+            } else if ($.isFunction(err.lowerCap)){
+                if (err.err=='x') err.lowerCap(ctx, lower, y, radius);
+                else err.lowerCap(ctx, x, lower, radius);
+            }
+        }
+    }
+
+    function drawPath(ctx, pts){
+        ctx.beginPath();
+        ctx.moveTo(pts[0][0], pts[0][1]);
+        for (var p=1; p < pts.length; p++)
+            ctx.lineTo(pts[p][0], pts[p][1]);
+        ctx.stroke();
+    }
+
+    function draw(plot, ctx){
+        var plotOffset = plot.getPlotOffset();
+
+        ctx.save();
+        ctx.translate(plotOffset.left, plotOffset.top);
+        $.each(plot.getData(), function (i, s) {
+            if (s.points.errorbars && (s.points.xerr.show || s.points.yerr.show))
+                drawSeriesErrors(plot, ctx, s);
+        });
+        ctx.restore();
+    }
+
+    function init(plot) {
+        plot.hooks.processRawData.push(processRawData);
+        plot.hooks.draw.push(draw);
+    }
+
+    $.plot.plugins.push({
+                init: init,
+                options: options,
+                name: 'errorbars',
+                version: '1.0'
+            });
+})(jQuery);
diff --git a/hledger-web/static/js/jquery.flot.errorbars.min.js b/hledger-web/static/js/jquery.flot.errorbars.min.js
new file mode 100644
index 000000000..aa79f541a
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.errorbars.min.js
@@ -0,0 +1,7 @@
+/* Javascript plotting library for jQuery, version 0.8.3.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/
+(function($){var options={series:{points:{errorbars:null,xerr:{err:"x",show:null,asymmetric:null,upperCap:null,lowerCap:null,color:null,radius:null},yerr:{err:"y",show:null,asymmetric:null,upperCap:null,lowerCap:null,color:null,radius:null}}}};function processRawData(plot,series,data,datapoints){if(!series.points.errorbars)return;var format=[{x:true,number:true,required:true},{y:true,number:true,required:true}];var errors=series.points.errorbars;if(errors=="x"||errors=="xy"){if(series.points.xerr.asymmetric){format.push({x:true,number:true,required:true});format.push({x:true,number:true,required:true})}else format.push({x:true,number:true,required:true})}if(errors=="y"||errors=="xy"){if(series.points.yerr.asymmetric){format.push({y:true,number:true,required:true});format.push({y:true,number:true,required:true})}else format.push({y:true,number:true,required:true})}datapoints.format=format}function parseErrors(series,i){var points=series.datapoints.points;var exl=null,exu=null,eyl=null,eyu=null;var xerr=series.points.xerr,yerr=series.points.yerr;var eb=series.points.errorbars;if(eb=="x"||eb=="xy"){if(xerr.asymmetric){exl=points[i+2];exu=points[i+3];if(eb=="xy")if(yerr.asymmetric){eyl=points[i+4];eyu=points[i+5]}else eyl=points[i+4]}else{exl=points[i+2];if(eb=="xy")if(yerr.asymmetric){eyl=points[i+3];eyu=points[i+4]}else eyl=points[i+3]}}else if(eb=="y")if(yerr.asymmetric){eyl=points[i+2];eyu=points[i+3]}else eyl=points[i+2];if(exu==null)exu=exl;if(eyu==null)eyu=eyl;var errRanges=[exl,exu,eyl,eyu];if(!xerr.show){errRanges[0]=null;errRanges[1]=null}if(!yerr.show){errRanges[2]=null;errRanges[3]=null}return errRanges}function drawSeriesErrors(plot,ctx,s){var points=s.datapoints.points,ps=s.datapoints.pointsize,ax=[s.xaxis,s.yaxis],radius=s.points.radius,err=[s.points.xerr,s.points.yerr];var invertX=false;if(ax[0].p2c(ax[0].max)ax[1].max||yax[0].max)continue;if(err[e].err=="y")if(x>ax[0].max||xax[1].max)continue;var drawUpper=true,drawLower=true;if(upper>minmax[1]){drawUpper=false;upper=minmax[1]}if(lower0&&sw>0){var w=sw/2;ctx.lineWidth=w;ctx.strokeStyle="rgba(0,0,0,0.1)";drawError(ctx,err[e],x,y,upper,lower,drawUpper,drawLower,radius,w+w/2,minmax);ctx.strokeStyle="rgba(0,0,0,0.2)";drawError(ctx,err[e],x,y,upper,lower,drawUpper,drawLower,radius,w/2,minmax)}ctx.strokeStyle=err[e].color?err[e].color:s.color;ctx.lineWidth=lw;drawError(ctx,err[e],x,y,upper,lower,drawUpper,drawLower,radius,0,minmax)}}}}function drawError(ctx,err,x,y,upper,lower,drawUpper,drawLower,radius,offset,minmax){y+=offset;upper+=offset;lower+=offset;if(err.err=="x"){if(upper>x+radius)drawPath(ctx,[[upper,y],[Math.max(x+radius,minmax[0]),y]]);else drawUpper=false;if(lowery+radius)drawPath(ctx,[[x,Math.max(y+radius,minmax[1])],[x,lower]]);else drawLower=false}radius=err.radius!=null?err.radius:radius;if(drawUpper){if(err.upperCap=="-"){if(err.err=="x")drawPath(ctx,[[upper,y-radius],[upper,y+radius]]);else drawPath(ctx,[[x-radius,upper],[x+radius,upper]])}else if($.isFunction(err.upperCap)){if(err.err=="x")err.upperCap(ctx,upper,y,radius);else err.upperCap(ctx,x,upper,radius)}}if(drawLower){if(err.lowerCap=="-"){if(err.err=="x")drawPath(ctx,[[lower,y-radius],[lower,y+radius]]);else drawPath(ctx,[[x-radius,lower],[x+radius,lower]])}else if($.isFunction(err.lowerCap)){if(err.err=="x")err.lowerCap(ctx,lower,y,radius);else err.lowerCap(ctx,x,lower,radius)}}}function drawPath(ctx,pts){ctx.beginPath();ctx.moveTo(pts[0][0],pts[0][1]);for(var p=1;p= allseries.length ) {
+					return null;
+				}
+				return allseries[ s.fillBetween ];
+			}
+
+			return null;
+		}
+
+		function computeFillBottoms( plot, s, datapoints ) {
+
+			if ( s.fillBetween == null ) {
+				return;
+			}
+
+			var other = findBottomSeries( s, plot.getData() );
+
+			if ( !other ) {
+				return;
+			}
+
+			var ps = datapoints.pointsize,
+				points = datapoints.points,
+				otherps = other.datapoints.pointsize,
+				otherpoints = other.datapoints.points,
+				newpoints = [],
+				px, py, intery, qx, qy, bottom,
+				withlines = s.lines.show,
+				withbottom = ps > 2 && datapoints.format[2].y,
+				withsteps = withlines && s.lines.steps,
+				fromgap = true,
+				i = 0,
+				j = 0,
+				l, m;
+
+			while ( true ) {
+
+				if ( i >= points.length ) {
+					break;
+				}
+
+				l = newpoints.length;
+
+				if ( points[ i ] == null ) {
+
+					// copy gaps
+
+					for ( m = 0; m < ps; ++m ) {
+						newpoints.push( points[ i + m ] );
+					}
+
+					i += ps;
+
+				} else if ( j >= otherpoints.length ) {
+
+					// for lines, we can't use the rest of the points
+
+					if ( !withlines ) {
+						for ( m = 0; m < ps; ++m ) {
+							newpoints.push( points[ i + m ] );
+						}
+					}
+
+					i += ps;
+
+				} else if ( otherpoints[ j ] == null ) {
+
+					// oops, got a gap
+
+					for ( m = 0; m < ps; ++m ) {
+						newpoints.push( null );
+					}
+
+					fromgap = true;
+					j += otherps;
+
+				} else {
+
+					// cases where we actually got two points
+
+					px = points[ i ];
+					py = points[ i + 1 ];
+					qx = otherpoints[ j ];
+					qy = otherpoints[ j + 1 ];
+					bottom = 0;
+
+					if ( px === qx ) {
+
+						for ( m = 0; m < ps; ++m ) {
+							newpoints.push( points[ i + m ] );
+						}
+
+						//newpoints[ l + 1 ] += qy;
+						bottom = qy;
+
+						i += ps;
+						j += otherps;
+
+					} else if ( px > qx ) {
+
+						// we got past point below, might need to
+						// insert interpolated extra point
+
+						if ( withlines && i > 0 && points[ i - ps ] != null ) {
+							intery = py + ( points[ i - ps + 1 ] - py ) * ( qx - px ) / ( points[ i - ps ] - px );
+							newpoints.push( qx );
+							newpoints.push( intery );
+							for ( m = 2; m < ps; ++m ) {
+								newpoints.push( points[ i + m ] );
+							}
+							bottom = qy;
+						}
+
+						j += otherps;
+
+					} else { // px < qx
+
+						// if we come from a gap, we just skip this point
+
+						if ( fromgap && withlines ) {
+							i += ps;
+							continue;
+						}
+
+						for ( m = 0; m < ps; ++m ) {
+							newpoints.push( points[ i + m ] );
+						}
+
+						// we might be able to interpolate a point below,
+						// this can give us a better y
+
+						if ( withlines && j > 0 && otherpoints[ j - otherps ] != null ) {
+							bottom = qy + ( otherpoints[ j - otherps + 1 ] - qy ) * ( px - qx ) / ( otherpoints[ j - otherps ] - qx );
+						}
+
+						//newpoints[l + 1] += bottom;
+
+						i += ps;
+					}
+
+					fromgap = false;
+
+					if ( l !== newpoints.length && withbottom ) {
+						newpoints[ l + 2 ] = bottom;
+					}
+				}
+
+				// maintain the line steps invariant
+
+				if ( withsteps && l !== newpoints.length && l > 0 &&
+					newpoints[ l ] !== null &&
+					newpoints[ l ] !== newpoints[ l - ps ] &&
+					newpoints[ l + 1 ] !== newpoints[ l - ps + 1 ] ) {
+					for (m = 0; m < ps; ++m) {
+						newpoints[ l + ps + m ] = newpoints[ l + m ];
+					}
+					newpoints[ l + 1 ] = newpoints[ l - ps + 1 ];
+				}
+			}
+
+			datapoints.points = newpoints;
+		}
+
+		plot.hooks.processDatapoints.push( computeFillBottoms );
+	}
+
+	$.plot.plugins.push({
+		init: init,
+		options: options,
+		name: "fillbetween",
+		version: "1.0"
+	});
+
+})(jQuery);
diff --git a/hledger-web/static/js/jquery.flot.fillbetween.min.js b/hledger-web/static/js/jquery.flot.fillbetween.min.js
new file mode 100644
index 000000000..464bf72c8
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.fillbetween.min.js
@@ -0,0 +1,7 @@
+/* Javascript plotting library for jQuery, version 0.8.3.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/
+(function($){var options={series:{fillBetween:null}};function init(plot){function findBottomSeries(s,allseries){var i;for(i=0;i=allseries.length){return null}return allseries[s.fillBetween]}return null}function computeFillBottoms(plot,s,datapoints){if(s.fillBetween==null){return}var other=findBottomSeries(s,plot.getData());if(!other){return}var ps=datapoints.pointsize,points=datapoints.points,otherps=other.datapoints.pointsize,otherpoints=other.datapoints.points,newpoints=[],px,py,intery,qx,qy,bottom,withlines=s.lines.show,withbottom=ps>2&&datapoints.format[2].y,withsteps=withlines&&s.lines.steps,fromgap=true,i=0,j=0,l,m;while(true){if(i>=points.length){break}l=newpoints.length;if(points[i]==null){for(m=0;m=otherpoints.length){if(!withlines){for(m=0;mqx){if(withlines&&i>0&&points[i-ps]!=null){intery=py+(points[i-ps+1]-py)*(qx-px)/(points[i-ps]-px);newpoints.push(qx);newpoints.push(intery);for(m=2;m0&&otherpoints[j-otherps]!=null){bottom=qy+(otherpoints[j-otherps+1]-qy)*(px-qx)/(otherpoints[j-otherps]-qx)}i+=ps}fromgap=false;if(l!==newpoints.length&&withbottom){newpoints[l+2]=bottom}}if(withsteps&&l!==newpoints.length&&l>0&&newpoints[l]!==null&&newpoints[l]!==newpoints[l-ps]&&newpoints[l+1]!==newpoints[l-ps+1]){for(m=0;m').load(handler).error(handler).attr('src', url);
+        });
+    };
+    
+    function drawSeries(plot, ctx, series) {
+        var plotOffset = plot.getPlotOffset();
+        
+        if (!series.images || !series.images.show)
+            return;
+        
+        var points = series.datapoints.points,
+            ps = series.datapoints.pointsize;
+        
+        for (var i = 0; i < points.length; i += ps) {
+            var img = points[i],
+                x1 = points[i + 1], y1 = points[i + 2],
+                x2 = points[i + 3], y2 = points[i + 4],
+                xaxis = series.xaxis, yaxis = series.yaxis,
+                tmp;
+
+            // actually we should check img.complete, but it
+            // appears to be a somewhat unreliable indicator in
+            // IE6 (false even after load event)
+            if (!img || img.width <= 0 || img.height <= 0)
+                continue;
+
+            if (x1 > x2) {
+                tmp = x2;
+                x2 = x1;
+                x1 = tmp;
+            }
+            if (y1 > y2) {
+                tmp = y2;
+                y2 = y1;
+                y1 = tmp;
+            }
+            
+            // if the anchor is at the center of the pixel, expand the 
+            // image by 1/2 pixel in each direction
+            if (series.images.anchor == "center") {
+                tmp = 0.5 * (x2-x1) / (img.width - 1);
+                x1 -= tmp;
+                x2 += tmp;
+                tmp = 0.5 * (y2-y1) / (img.height - 1);
+                y1 -= tmp;
+                y2 += tmp;
+            }
+            
+            // clip
+            if (x1 == x2 || y1 == y2 ||
+                x1 >= xaxis.max || x2 <= xaxis.min ||
+                y1 >= yaxis.max || y2 <= yaxis.min)
+                continue;
+
+            var sx1 = 0, sy1 = 0, sx2 = img.width, sy2 = img.height;
+            if (x1 < xaxis.min) {
+                sx1 += (sx2 - sx1) * (xaxis.min - x1) / (x2 - x1);
+                x1 = xaxis.min;
+            }
+
+            if (x2 > xaxis.max) {
+                sx2 += (sx2 - sx1) * (xaxis.max - x2) / (x2 - x1);
+                x2 = xaxis.max;
+            }
+
+            if (y1 < yaxis.min) {
+                sy2 += (sy1 - sy2) * (yaxis.min - y1) / (y2 - y1);
+                y1 = yaxis.min;
+            }
+
+            if (y2 > yaxis.max) {
+                sy1 += (sy1 - sy2) * (yaxis.max - y2) / (y2 - y1);
+                y2 = yaxis.max;
+            }
+            
+            x1 = xaxis.p2c(x1);
+            x2 = xaxis.p2c(x2);
+            y1 = yaxis.p2c(y1);
+            y2 = yaxis.p2c(y2);
+            
+            // the transformation may have swapped us
+            if (x1 > x2) {
+                tmp = x2;
+                x2 = x1;
+                x1 = tmp;
+            }
+            if (y1 > y2) {
+                tmp = y2;
+                y2 = y1;
+                y1 = tmp;
+            }
+
+            tmp = ctx.globalAlpha;
+            ctx.globalAlpha *= series.images.alpha;
+            ctx.drawImage(img,
+                          sx1, sy1, sx2 - sx1, sy2 - sy1,
+                          x1 + plotOffset.left, y1 + plotOffset.top,
+                          x2 - x1, y2 - y1);
+            ctx.globalAlpha = tmp;
+        }
+    }
+
+    function processRawData(plot, series, data, datapoints) {
+        if (!series.images.show)
+            return;
+
+        // format is Image, x1, y1, x2, y2 (opposite corners)
+        datapoints.format = [
+            { required: true },
+            { x: true, number: true, required: true },
+            { y: true, number: true, required: true },
+            { x: true, number: true, required: true },
+            { y: true, number: true, required: true }
+        ];
+    }
+    
+    function init(plot) {
+        plot.hooks.processRawData.push(processRawData);
+        plot.hooks.drawSeries.push(drawSeries);
+    }
+    
+    $.plot.plugins.push({
+        init: init,
+        options: options,
+        name: 'image',
+        version: '1.1'
+    });
+})(jQuery);
diff --git a/hledger-web/static/js/jquery.flot.image.min.js b/hledger-web/static/js/jquery.flot.image.min.js
new file mode 100644
index 000000000..09df132f0
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.image.min.js
@@ -0,0 +1,7 @@
+/* Javascript plotting library for jQuery, version 0.8.3.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/
+(function($){var options={series:{images:{show:false,alpha:1,anchor:"corner"}}};$.plot.image={};$.plot.image.loadDataImages=function(series,options,callback){var urls=[],points=[];var defaultShow=options.series.images.show;$.each(series,function(i,s){if(!(defaultShow||s.images.show))return;if(s.data)s=s.data;$.each(s,function(i,p){if(typeof p[0]=="string"){urls.push(p[0]);points.push(p)}})});$.plot.image.load(urls,function(loadedImages){$.each(points,function(i,p){var url=p[0];if(loadedImages[url])p[0]=loadedImages[url]});callback()})};$.plot.image.load=function(urls,callback){var missing=urls.length,loaded={};if(missing==0)callback({});$.each(urls,function(i,url){var handler=function(){--missing;loaded[url]=this;if(missing==0)callback(loaded)};$("![]() ").load(handler).error(handler).attr("src",url)})};function drawSeries(plot,ctx,series){var plotOffset=plot.getPlotOffset();if(!series.images||!series.images.show)return;var points=series.datapoints.points,ps=series.datapoints.pointsize;for(var i=0;ix2){tmp=x2;x2=x1;x1=tmp}if(y1>y2){tmp=y2;y2=y1;y1=tmp}if(series.images.anchor=="center"){tmp=.5*(x2-x1)/(img.width-1);x1-=tmp;x2+=tmp;tmp=.5*(y2-y1)/(img.height-1);y1-=tmp;y2+=tmp}if(x1==x2||y1==y2||x1>=xaxis.max||x2<=xaxis.min||y1>=yaxis.max||y2<=yaxis.min)continue;var sx1=0,sy1=0,sx2=img.width,sy2=img.height;if(x1xaxis.max){sx2+=(sx2-sx1)*(xaxis.max-x2)/(x2-x1);x2=xaxis.max}if(y1yaxis.max){sy1+=(sy1-sy2)*(yaxis.max-y2)/(y2-y1);y2=yaxis.max}x1=xaxis.p2c(x1);x2=xaxis.p2c(x2);y1=yaxis.p2c(y1);y2=yaxis.p2c(y2);if(x1>x2){tmp=x2;x2=x1;x1=tmp}if(y1>y2){tmp=y2;y2=y1;y1=tmp}tmp=ctx.globalAlpha;ctx.globalAlpha*=series.images.alpha;ctx.drawImage(img,sx1,sy1,sx2-sx1,sy2-sy1,x1+plotOffset.left,y1+plotOffset.top,x2-x1,y2-y1);ctx.globalAlpha=tmp}}function processRawData(plot,series,data,datapoints){if(!series.images.show)return;datapoints.format=[{required:true},{x:true,number:true,required:true},{y:true,number:true,required:true},{x:true,number:true,required:true},{y:true,number:true,required:true}]}function init(plot){plot.hooks.processRawData.push(processRawData);plot.hooks.drawSeries.push(drawSeries)}$.plot.plugins.push({init:init,options:options,name:"image",version:"1.1"})})(jQuery);
\ No newline at end of file
diff --git a/hledger-web/static/js/jquery.flot.navigate.js b/hledger-web/static/js/jquery.flot.navigate.js
new file mode 100644
index 000000000..13fb7f17d
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.navigate.js
@@ -0,0 +1,346 @@
+/* Flot plugin for adding the ability to pan and zoom the plot.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+The default behaviour is double click and scrollwheel up/down to zoom in, drag
+to pan. The plugin defines plot.zoom({ center }), plot.zoomOut() and
+plot.pan( offset ) so you easily can add custom controls. It also fires
+"plotpan" and "plotzoom" events, useful for synchronizing plots.
+
+The plugin supports these options:
+
+	zoom: {
+		interactive: false
+		trigger: "dblclick" // or "click" for single click
+		amount: 1.5         // 2 = 200% (zoom in), 0.5 = 50% (zoom out)
+	}
+
+	pan: {
+		interactive: false
+		cursor: "move"      // CSS mouse cursor value used when dragging, e.g. "pointer"
+		frameRate: 20
+	}
+
+	xaxis, yaxis, x2axis, y2axis: {
+		zoomRange: null  // or [ number, number ] (min range, max range) or false
+		panRange: null   // or [ number, number ] (min, max) or false
+	}
+
+"interactive" enables the built-in drag/click behaviour. If you enable
+interactive for pan, then you'll have a basic plot that supports moving
+around; the same for zoom.
+
+"amount" specifies the default amount to zoom in (so 1.5 = 150%) relative to
+the current viewport.
+
+"cursor" is a standard CSS mouse cursor string used for visual feedback to the
+user when dragging.
+
+"frameRate" specifies the maximum number of times per second the plot will
+update itself while the user is panning around on it (set to null to disable
+intermediate pans, the plot will then not update until the mouse button is
+released).
+
+"zoomRange" is the interval in which zooming can happen, e.g. with zoomRange:
+[1, 100] the zoom will never scale the axis so that the difference between min
+and max is smaller than 1 or larger than 100. You can set either end to null
+to ignore, e.g. [1, null]. If you set zoomRange to false, zooming on that axis
+will be disabled.
+
+"panRange" confines the panning to stay within a range, e.g. with panRange:
+[-10, 20] panning stops at -10 in one end and at 20 in the other. Either can
+be null, e.g. [-10, null]. If you set panRange to false, panning on that axis
+will be disabled.
+
+Example API usage:
+
+	plot = $.plot(...);
+
+	// zoom default amount in on the pixel ( 10, 20 )
+	plot.zoom({ center: { left: 10, top: 20 } });
+
+	// zoom out again
+	plot.zoomOut({ center: { left: 10, top: 20 } });
+
+	// zoom 200% in on the pixel (10, 20)
+	plot.zoom({ amount: 2, center: { left: 10, top: 20 } });
+
+	// pan 100 pixels to the left and 20 down
+	plot.pan({ left: -100, top: 20 })
+
+Here, "center" specifies where the center of the zooming should happen. Note
+that this is defined in pixel space, not the space of the data points (you can
+use the p2c helpers on the axes in Flot to help you convert between these).
+
+"amount" is the amount to zoom the viewport relative to the current range, so
+1 is 100% (i.e. no change), 1.5 is 150% (zoom in), 0.7 is 70% (zoom out). You
+can set the default in the options.
+
+*/
+
+// First two dependencies, jquery.event.drag.js and
+// jquery.mousewheel.js, we put them inline here to save people the
+// effort of downloading them.
+
+/*
+jquery.event.drag.js ~ v1.5 ~ Copyright (c) 2008, Three Dub Media (http://threedubmedia.com)
+Licensed under the MIT License ~ http://threedubmedia.googlecode.com/files/MIT-LICENSE.txt
+*/
+(function(a){function e(h){var k,j=this,l=h.data||{};if(l.elem)j=h.dragTarget=l.elem,h.dragProxy=d.proxy||j,h.cursorOffsetX=l.pageX-l.left,h.cursorOffsetY=l.pageY-l.top,h.offsetX=h.pageX-h.cursorOffsetX,h.offsetY=h.pageY-h.cursorOffsetY;else if(d.dragging||l.which>0&&h.which!=l.which||a(h.target).is(l.not))return;switch(h.type){case"mousedown":return a.extend(l,a(j).offset(),{elem:j,target:h.target,pageX:h.pageX,pageY:h.pageY}),b.add(document,"mousemove mouseup",e,l),i(j,!1),d.dragging=null,!1;case!d.dragging&&"mousemove":if(g(h.pageX-l.pageX)+g(h.pageY-l.pageY) max) {
+                    // make sure min < max
+                    var tmp = min;
+                    min = max;
+                    max = tmp;
+                }
+
+                //Check that we are in panRange
+                if (pr) {
+                    if (pr[0] != null && min < pr[0]) {
+                        min = pr[0];
+                    }
+                    if (pr[1] != null && max > pr[1]) {
+                        max = pr[1];
+                    }
+                }
+
+                var range = max - min;
+                if (zr &&
+                    ((zr[0] != null && range < zr[0] && amount >1) ||
+                     (zr[1] != null && range > zr[1] && amount <1)))
+                    return;
+            
+                opts.min = min;
+                opts.max = max;
+            });
+            
+            plot.setupGrid();
+            plot.draw();
+            
+            if (!args.preventEvent)
+                plot.getPlaceholder().trigger("plotzoom", [ plot, args ]);
+        };
+
+        plot.pan = function (args) {
+            var delta = {
+                x: +args.left,
+                y: +args.top
+            };
+
+            if (isNaN(delta.x))
+                delta.x = 0;
+            if (isNaN(delta.y))
+                delta.y = 0;
+
+            $.each(plot.getAxes(), function (_, axis) {
+                var opts = axis.options,
+                    min, max, d = delta[axis.direction];
+
+                min = axis.c2p(axis.p2c(axis.min) + d),
+                max = axis.c2p(axis.p2c(axis.max) + d);
+
+                var pr = opts.panRange;
+                if (pr === false) // no panning on this axis
+                    return;
+                
+                if (pr) {
+                    // check whether we hit the wall
+                    if (pr[0] != null && pr[0] > min) {
+                        d = pr[0] - min;
+                        min += d;
+                        max += d;
+                    }
+                    
+                    if (pr[1] != null && pr[1] < max) {
+                        d = pr[1] - max;
+                        min += d;
+                        max += d;
+                    }
+                }
+                
+                opts.min = min;
+                opts.max = max;
+            });
+            
+            plot.setupGrid();
+            plot.draw();
+            
+            if (!args.preventEvent)
+                plot.getPlaceholder().trigger("plotpan", [ plot, args ]);
+        };
+
+        function shutdown(plot, eventHolder) {
+            eventHolder.unbind(plot.getOptions().zoom.trigger, onZoomClick);
+            eventHolder.unbind("mousewheel", onMouseWheel);
+            eventHolder.unbind("dragstart", onDragStart);
+            eventHolder.unbind("drag", onDrag);
+            eventHolder.unbind("dragend", onDragEnd);
+            if (panTimeout)
+                clearTimeout(panTimeout);
+        }
+        
+        plot.hooks.bindEvents.push(bindEvents);
+        plot.hooks.shutdown.push(shutdown);
+    }
+    
+    $.plot.plugins.push({
+        init: init,
+        options: options,
+        name: 'navigate',
+        version: '1.3'
+    });
+})(jQuery);
diff --git a/hledger-web/static/js/jquery.flot.navigate.min.js b/hledger-web/static/js/jquery.flot.navigate.min.js
new file mode 100644
index 000000000..7288a23fa
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.navigate.min.js
@@ -0,0 +1,7 @@
+/* Javascript plotting library for jQuery, version 0.8.3.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/
+(function(a){function e(h){var k,j=this,l=h.data||{};if(l.elem)j=h.dragTarget=l.elem,h.dragProxy=d.proxy||j,h.cursorOffsetX=l.pageX-l.left,h.cursorOffsetY=l.pageY-l.top,h.offsetX=h.pageX-h.cursorOffsetX,h.offsetY=h.pageY-h.cursorOffsetY;else if(d.dragging||l.which>0&&h.which!=l.which||a(h.target).is(l.not))return;switch(h.type){case"mousedown":return a.extend(l,a(j).offset(),{elem:j,target:h.target,pageX:h.pageX,pageY:h.pageY}),b.add(document,"mousemove mouseup",e,l),i(j,!1),d.dragging=null,!1;case!d.dragging&&"mousemove":if(g(h.pageX-l.pageX)+g(h.pageY-l.pageY)max){var tmp=min;min=max;max=tmp}if(pr){if(pr[0]!=null&&minpr[1]){max=pr[1]}}var range=max-min;if(zr&&(zr[0]!=null&&range1||zr[1]!=null&&range>zr[1]&&amount<1))return;opts.min=min;opts.max=max});plot.setupGrid();plot.draw();if(!args.preventEvent)plot.getPlaceholder().trigger("plotzoom",[plot,args])};plot.pan=function(args){var delta={x:+args.left,y:+args.top};if(isNaN(delta.x))delta.x=0;if(isNaN(delta.y))delta.y=0;$.each(plot.getAxes(),function(_,axis){var opts=axis.options,min,max,d=delta[axis.direction];min=axis.c2p(axis.p2c(axis.min)+d),max=axis.c2p(axis.p2c(axis.max)+d);var pr=opts.panRange;if(pr===false)return;if(pr){if(pr[0]!=null&&pr[0]>min){d=pr[0]-min;min+=d;max+=d}if(pr[1]!=null&&pr[1] 1) {
+					options.series.pie.tilt = 1;
+				} else if (options.series.pie.tilt < 0) {
+					options.series.pie.tilt = 0;
+				}
+			}
+		});
+
+		plot.hooks.bindEvents.push(function(plot, eventHolder) {
+			var options = plot.getOptions();
+			if (options.series.pie.show) {
+				if (options.grid.hoverable) {
+					eventHolder.unbind("mousemove").mousemove(onMouseMove);
+				}
+				if (options.grid.clickable) {
+					eventHolder.unbind("click").click(onClick);
+				}
+			}
+		});
+
+		plot.hooks.processDatapoints.push(function(plot, series, data, datapoints) {
+			var options = plot.getOptions();
+			if (options.series.pie.show) {
+				processDatapoints(plot, series, data, datapoints);
+			}
+		});
+
+		plot.hooks.drawOverlay.push(function(plot, octx) {
+			var options = plot.getOptions();
+			if (options.series.pie.show) {
+				drawOverlay(plot, octx);
+			}
+		});
+
+		plot.hooks.draw.push(function(plot, newCtx) {
+			var options = plot.getOptions();
+			if (options.series.pie.show) {
+				draw(plot, newCtx);
+			}
+		});
+
+		function processDatapoints(plot, series, datapoints) {
+			if (!processed)	{
+				processed = true;
+				canvas = plot.getCanvas();
+				target = $(canvas).parent();
+				options = plot.getOptions();
+				plot.setData(combine(plot.getData()));
+			}
+		}
+
+		function combine(data) {
+
+			var total = 0,
+				combined = 0,
+				numCombined = 0,
+				color = options.series.pie.combine.color,
+				newdata = [];
+
+			// Fix up the raw data from Flot, ensuring the data is numeric
+
+			for (var i = 0; i < data.length; ++i) {
+
+				var value = data[i].data;
+
+				// If the data is an array, we'll assume that it's a standard
+				// Flot x-y pair, and are concerned only with the second value.
+
+				// Note how we use the original array, rather than creating a
+				// new one; this is more efficient and preserves any extra data
+				// that the user may have stored in higher indexes.
+
+				if ($.isArray(value) && value.length == 1) {
+    				value = value[0];
+				}
+
+				if ($.isArray(value)) {
+					// Equivalent to $.isNumeric() but compatible with jQuery < 1.7
+					if (!isNaN(parseFloat(value[1])) && isFinite(value[1])) {
+						value[1] = +value[1];
+					} else {
+						value[1] = 0;
+					}
+				} else if (!isNaN(parseFloat(value)) && isFinite(value)) {
+					value = [1, +value];
+				} else {
+					value = [1, 0];
+				}
+
+				data[i].data = [value];
+			}
+
+			// Sum up all the slices, so we can calculate percentages for each
+
+			for (var i = 0; i < data.length; ++i) {
+				total += data[i].data[0][1];
+			}
+
+			// Count the number of slices with percentages below the combine
+			// threshold; if it turns out to be just one, we won't combine.
+
+			for (var i = 0; i < data.length; ++i) {
+				var value = data[i].data[0][1];
+				if (value / total <= options.series.pie.combine.threshold) {
+					combined += value;
+					numCombined++;
+					if (!color) {
+						color = data[i].color;
+					}
+				}
+			}
+
+			for (var i = 0; i < data.length; ++i) {
+				var value = data[i].data[0][1];
+				if (numCombined < 2 || value / total > options.series.pie.combine.threshold) {
+					newdata.push(
+						$.extend(data[i], {     /* extend to allow keeping all other original data values
+						                           and using them e.g. in labelFormatter. */
+							data: [[1, value]],
+							color: data[i].color,
+							label: data[i].label,
+							angle: value * Math.PI * 2 / total,
+							percent: value / (total / 100)
+						})
+					);
+				}
+			}
+
+			if (numCombined > 1) {
+				newdata.push({
+					data: [[1, combined]],
+					color: color,
+					label: options.series.pie.combine.label,
+					angle: combined * Math.PI * 2 / total,
+					percent: combined / (total / 100)
+				});
+			}
+
+			return newdata;
+		}
+
+		function draw(plot, newCtx) {
+
+			if (!target) {
+				return; // if no series were passed
+			}
+
+			var canvasWidth = plot.getPlaceholder().width(),
+				canvasHeight = plot.getPlaceholder().height(),
+				legendWidth = target.children().filter(".legend").children().width() || 0;
+
+			ctx = newCtx;
+
+			// WARNING: HACK! REWRITE THIS CODE AS SOON AS POSSIBLE!
+
+			// When combining smaller slices into an 'other' slice, we need to
+			// add a new series.  Since Flot gives plugins no way to modify the
+			// list of series, the pie plugin uses a hack where the first call
+			// to processDatapoints results in a call to setData with the new
+			// list of series, then subsequent processDatapoints do nothing.
+
+			// The plugin-global 'processed' flag is used to control this hack;
+			// it starts out false, and is set to true after the first call to
+			// processDatapoints.
+
+			// Unfortunately this turns future setData calls into no-ops; they
+			// call processDatapoints, the flag is true, and nothing happens.
+
+			// To fix this we'll set the flag back to false here in draw, when
+			// all series have been processed, so the next sequence of calls to
+			// processDatapoints once again starts out with a slice-combine.
+			// This is really a hack; in 0.9 we need to give plugins a proper
+			// way to modify series before any processing begins.
+
+			processed = false;
+
+			// calculate maximum radius and center point
+
+			maxRadius =  Math.min(canvasWidth, canvasHeight / options.series.pie.tilt) / 2;
+			centerTop = canvasHeight / 2 + options.series.pie.offset.top;
+			centerLeft = canvasWidth / 2;
+
+			if (options.series.pie.offset.left == "auto") {
+				if (options.legend.position.match("w")) {
+					centerLeft += legendWidth / 2;
+				} else {
+					centerLeft -= legendWidth / 2;
+				}
+				if (centerLeft < maxRadius) {
+					centerLeft = maxRadius;
+				} else if (centerLeft > canvasWidth - maxRadius) {
+					centerLeft = canvasWidth - maxRadius;
+				}
+			} else {
+				centerLeft += options.series.pie.offset.left;
+			}
+
+			var slices = plot.getData(),
+				attempts = 0;
+
+			// Keep shrinking the pie's radius until drawPie returns true,
+			// indicating that all the labels fit, or we try too many times.
+
+			do {
+				if (attempts > 0) {
+					maxRadius *= REDRAW_SHRINK;
+				}
+				attempts += 1;
+				clear();
+				if (options.series.pie.tilt <= 0.8) {
+					drawShadow();
+				}
+			} while (!drawPie() && attempts < REDRAW_ATTEMPTS)
+
+			if (attempts >= REDRAW_ATTEMPTS) {
+				clear();
+				target.prepend("
").load(handler).error(handler).attr("src",url)})};function drawSeries(plot,ctx,series){var plotOffset=plot.getPlotOffset();if(!series.images||!series.images.show)return;var points=series.datapoints.points,ps=series.datapoints.pointsize;for(var i=0;ix2){tmp=x2;x2=x1;x1=tmp}if(y1>y2){tmp=y2;y2=y1;y1=tmp}if(series.images.anchor=="center"){tmp=.5*(x2-x1)/(img.width-1);x1-=tmp;x2+=tmp;tmp=.5*(y2-y1)/(img.height-1);y1-=tmp;y2+=tmp}if(x1==x2||y1==y2||x1>=xaxis.max||x2<=xaxis.min||y1>=yaxis.max||y2<=yaxis.min)continue;var sx1=0,sy1=0,sx2=img.width,sy2=img.height;if(x1xaxis.max){sx2+=(sx2-sx1)*(xaxis.max-x2)/(x2-x1);x2=xaxis.max}if(y1yaxis.max){sy1+=(sy1-sy2)*(yaxis.max-y2)/(y2-y1);y2=yaxis.max}x1=xaxis.p2c(x1);x2=xaxis.p2c(x2);y1=yaxis.p2c(y1);y2=yaxis.p2c(y2);if(x1>x2){tmp=x2;x2=x1;x1=tmp}if(y1>y2){tmp=y2;y2=y1;y1=tmp}tmp=ctx.globalAlpha;ctx.globalAlpha*=series.images.alpha;ctx.drawImage(img,sx1,sy1,sx2-sx1,sy2-sy1,x1+plotOffset.left,y1+plotOffset.top,x2-x1,y2-y1);ctx.globalAlpha=tmp}}function processRawData(plot,series,data,datapoints){if(!series.images.show)return;datapoints.format=[{required:true},{x:true,number:true,required:true},{y:true,number:true,required:true},{x:true,number:true,required:true},{y:true,number:true,required:true}]}function init(plot){plot.hooks.processRawData.push(processRawData);plot.hooks.drawSeries.push(drawSeries)}$.plot.plugins.push({init:init,options:options,name:"image",version:"1.1"})})(jQuery);
\ No newline at end of file
diff --git a/hledger-web/static/js/jquery.flot.navigate.js b/hledger-web/static/js/jquery.flot.navigate.js
new file mode 100644
index 000000000..13fb7f17d
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.navigate.js
@@ -0,0 +1,346 @@
+/* Flot plugin for adding the ability to pan and zoom the plot.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+The default behaviour is double click and scrollwheel up/down to zoom in, drag
+to pan. The plugin defines plot.zoom({ center }), plot.zoomOut() and
+plot.pan( offset ) so you easily can add custom controls. It also fires
+"plotpan" and "plotzoom" events, useful for synchronizing plots.
+
+The plugin supports these options:
+
+	zoom: {
+		interactive: false
+		trigger: "dblclick" // or "click" for single click
+		amount: 1.5         // 2 = 200% (zoom in), 0.5 = 50% (zoom out)
+	}
+
+	pan: {
+		interactive: false
+		cursor: "move"      // CSS mouse cursor value used when dragging, e.g. "pointer"
+		frameRate: 20
+	}
+
+	xaxis, yaxis, x2axis, y2axis: {
+		zoomRange: null  // or [ number, number ] (min range, max range) or false
+		panRange: null   // or [ number, number ] (min, max) or false
+	}
+
+"interactive" enables the built-in drag/click behaviour. If you enable
+interactive for pan, then you'll have a basic plot that supports moving
+around; the same for zoom.
+
+"amount" specifies the default amount to zoom in (so 1.5 = 150%) relative to
+the current viewport.
+
+"cursor" is a standard CSS mouse cursor string used for visual feedback to the
+user when dragging.
+
+"frameRate" specifies the maximum number of times per second the plot will
+update itself while the user is panning around on it (set to null to disable
+intermediate pans, the plot will then not update until the mouse button is
+released).
+
+"zoomRange" is the interval in which zooming can happen, e.g. with zoomRange:
+[1, 100] the zoom will never scale the axis so that the difference between min
+and max is smaller than 1 or larger than 100. You can set either end to null
+to ignore, e.g. [1, null]. If you set zoomRange to false, zooming on that axis
+will be disabled.
+
+"panRange" confines the panning to stay within a range, e.g. with panRange:
+[-10, 20] panning stops at -10 in one end and at 20 in the other. Either can
+be null, e.g. [-10, null]. If you set panRange to false, panning on that axis
+will be disabled.
+
+Example API usage:
+
+	plot = $.plot(...);
+
+	// zoom default amount in on the pixel ( 10, 20 )
+	plot.zoom({ center: { left: 10, top: 20 } });
+
+	// zoom out again
+	plot.zoomOut({ center: { left: 10, top: 20 } });
+
+	// zoom 200% in on the pixel (10, 20)
+	plot.zoom({ amount: 2, center: { left: 10, top: 20 } });
+
+	// pan 100 pixels to the left and 20 down
+	plot.pan({ left: -100, top: 20 })
+
+Here, "center" specifies where the center of the zooming should happen. Note
+that this is defined in pixel space, not the space of the data points (you can
+use the p2c helpers on the axes in Flot to help you convert between these).
+
+"amount" is the amount to zoom the viewport relative to the current range, so
+1 is 100% (i.e. no change), 1.5 is 150% (zoom in), 0.7 is 70% (zoom out). You
+can set the default in the options.
+
+*/
+
+// First two dependencies, jquery.event.drag.js and
+// jquery.mousewheel.js, we put them inline here to save people the
+// effort of downloading them.
+
+/*
+jquery.event.drag.js ~ v1.5 ~ Copyright (c) 2008, Three Dub Media (http://threedubmedia.com)
+Licensed under the MIT License ~ http://threedubmedia.googlecode.com/files/MIT-LICENSE.txt
+*/
+(function(a){function e(h){var k,j=this,l=h.data||{};if(l.elem)j=h.dragTarget=l.elem,h.dragProxy=d.proxy||j,h.cursorOffsetX=l.pageX-l.left,h.cursorOffsetY=l.pageY-l.top,h.offsetX=h.pageX-h.cursorOffsetX,h.offsetY=h.pageY-h.cursorOffsetY;else if(d.dragging||l.which>0&&h.which!=l.which||a(h.target).is(l.not))return;switch(h.type){case"mousedown":return a.extend(l,a(j).offset(),{elem:j,target:h.target,pageX:h.pageX,pageY:h.pageY}),b.add(document,"mousemove mouseup",e,l),i(j,!1),d.dragging=null,!1;case!d.dragging&&"mousemove":if(g(h.pageX-l.pageX)+g(h.pageY-l.pageY) max) {
+                    // make sure min < max
+                    var tmp = min;
+                    min = max;
+                    max = tmp;
+                }
+
+                //Check that we are in panRange
+                if (pr) {
+                    if (pr[0] != null && min < pr[0]) {
+                        min = pr[0];
+                    }
+                    if (pr[1] != null && max > pr[1]) {
+                        max = pr[1];
+                    }
+                }
+
+                var range = max - min;
+                if (zr &&
+                    ((zr[0] != null && range < zr[0] && amount >1) ||
+                     (zr[1] != null && range > zr[1] && amount <1)))
+                    return;
+            
+                opts.min = min;
+                opts.max = max;
+            });
+            
+            plot.setupGrid();
+            plot.draw();
+            
+            if (!args.preventEvent)
+                plot.getPlaceholder().trigger("plotzoom", [ plot, args ]);
+        };
+
+        plot.pan = function (args) {
+            var delta = {
+                x: +args.left,
+                y: +args.top
+            };
+
+            if (isNaN(delta.x))
+                delta.x = 0;
+            if (isNaN(delta.y))
+                delta.y = 0;
+
+            $.each(plot.getAxes(), function (_, axis) {
+                var opts = axis.options,
+                    min, max, d = delta[axis.direction];
+
+                min = axis.c2p(axis.p2c(axis.min) + d),
+                max = axis.c2p(axis.p2c(axis.max) + d);
+
+                var pr = opts.panRange;
+                if (pr === false) // no panning on this axis
+                    return;
+                
+                if (pr) {
+                    // check whether we hit the wall
+                    if (pr[0] != null && pr[0] > min) {
+                        d = pr[0] - min;
+                        min += d;
+                        max += d;
+                    }
+                    
+                    if (pr[1] != null && pr[1] < max) {
+                        d = pr[1] - max;
+                        min += d;
+                        max += d;
+                    }
+                }
+                
+                opts.min = min;
+                opts.max = max;
+            });
+            
+            plot.setupGrid();
+            plot.draw();
+            
+            if (!args.preventEvent)
+                plot.getPlaceholder().trigger("plotpan", [ plot, args ]);
+        };
+
+        function shutdown(plot, eventHolder) {
+            eventHolder.unbind(plot.getOptions().zoom.trigger, onZoomClick);
+            eventHolder.unbind("mousewheel", onMouseWheel);
+            eventHolder.unbind("dragstart", onDragStart);
+            eventHolder.unbind("drag", onDrag);
+            eventHolder.unbind("dragend", onDragEnd);
+            if (panTimeout)
+                clearTimeout(panTimeout);
+        }
+        
+        plot.hooks.bindEvents.push(bindEvents);
+        plot.hooks.shutdown.push(shutdown);
+    }
+    
+    $.plot.plugins.push({
+        init: init,
+        options: options,
+        name: 'navigate',
+        version: '1.3'
+    });
+})(jQuery);
diff --git a/hledger-web/static/js/jquery.flot.navigate.min.js b/hledger-web/static/js/jquery.flot.navigate.min.js
new file mode 100644
index 000000000..7288a23fa
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.navigate.min.js
@@ -0,0 +1,7 @@
+/* Javascript plotting library for jQuery, version 0.8.3.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/
+(function(a){function e(h){var k,j=this,l=h.data||{};if(l.elem)j=h.dragTarget=l.elem,h.dragProxy=d.proxy||j,h.cursorOffsetX=l.pageX-l.left,h.cursorOffsetY=l.pageY-l.top,h.offsetX=h.pageX-h.cursorOffsetX,h.offsetY=h.pageY-h.cursorOffsetY;else if(d.dragging||l.which>0&&h.which!=l.which||a(h.target).is(l.not))return;switch(h.type){case"mousedown":return a.extend(l,a(j).offset(),{elem:j,target:h.target,pageX:h.pageX,pageY:h.pageY}),b.add(document,"mousemove mouseup",e,l),i(j,!1),d.dragging=null,!1;case!d.dragging&&"mousemove":if(g(h.pageX-l.pageX)+g(h.pageY-l.pageY)max){var tmp=min;min=max;max=tmp}if(pr){if(pr[0]!=null&&minpr[1]){max=pr[1]}}var range=max-min;if(zr&&(zr[0]!=null&&range1||zr[1]!=null&&range>zr[1]&&amount<1))return;opts.min=min;opts.max=max});plot.setupGrid();plot.draw();if(!args.preventEvent)plot.getPlaceholder().trigger("plotzoom",[plot,args])};plot.pan=function(args){var delta={x:+args.left,y:+args.top};if(isNaN(delta.x))delta.x=0;if(isNaN(delta.y))delta.y=0;$.each(plot.getAxes(),function(_,axis){var opts=axis.options,min,max,d=delta[axis.direction];min=axis.c2p(axis.p2c(axis.min)+d),max=axis.c2p(axis.p2c(axis.max)+d);var pr=opts.panRange;if(pr===false)return;if(pr){if(pr[0]!=null&&pr[0]>min){d=pr[0]-min;min+=d;max+=d}if(pr[1]!=null&&pr[1] 1) {
+					options.series.pie.tilt = 1;
+				} else if (options.series.pie.tilt < 0) {
+					options.series.pie.tilt = 0;
+				}
+			}
+		});
+
+		plot.hooks.bindEvents.push(function(plot, eventHolder) {
+			var options = plot.getOptions();
+			if (options.series.pie.show) {
+				if (options.grid.hoverable) {
+					eventHolder.unbind("mousemove").mousemove(onMouseMove);
+				}
+				if (options.grid.clickable) {
+					eventHolder.unbind("click").click(onClick);
+				}
+			}
+		});
+
+		plot.hooks.processDatapoints.push(function(plot, series, data, datapoints) {
+			var options = plot.getOptions();
+			if (options.series.pie.show) {
+				processDatapoints(plot, series, data, datapoints);
+			}
+		});
+
+		plot.hooks.drawOverlay.push(function(plot, octx) {
+			var options = plot.getOptions();
+			if (options.series.pie.show) {
+				drawOverlay(plot, octx);
+			}
+		});
+
+		plot.hooks.draw.push(function(plot, newCtx) {
+			var options = plot.getOptions();
+			if (options.series.pie.show) {
+				draw(plot, newCtx);
+			}
+		});
+
+		function processDatapoints(plot, series, datapoints) {
+			if (!processed)	{
+				processed = true;
+				canvas = plot.getCanvas();
+				target = $(canvas).parent();
+				options = plot.getOptions();
+				plot.setData(combine(plot.getData()));
+			}
+		}
+
+		function combine(data) {
+
+			var total = 0,
+				combined = 0,
+				numCombined = 0,
+				color = options.series.pie.combine.color,
+				newdata = [];
+
+			// Fix up the raw data from Flot, ensuring the data is numeric
+
+			for (var i = 0; i < data.length; ++i) {
+
+				var value = data[i].data;
+
+				// If the data is an array, we'll assume that it's a standard
+				// Flot x-y pair, and are concerned only with the second value.
+
+				// Note how we use the original array, rather than creating a
+				// new one; this is more efficient and preserves any extra data
+				// that the user may have stored in higher indexes.
+
+				if ($.isArray(value) && value.length == 1) {
+    				value = value[0];
+				}
+
+				if ($.isArray(value)) {
+					// Equivalent to $.isNumeric() but compatible with jQuery < 1.7
+					if (!isNaN(parseFloat(value[1])) && isFinite(value[1])) {
+						value[1] = +value[1];
+					} else {
+						value[1] = 0;
+					}
+				} else if (!isNaN(parseFloat(value)) && isFinite(value)) {
+					value = [1, +value];
+				} else {
+					value = [1, 0];
+				}
+
+				data[i].data = [value];
+			}
+
+			// Sum up all the slices, so we can calculate percentages for each
+
+			for (var i = 0; i < data.length; ++i) {
+				total += data[i].data[0][1];
+			}
+
+			// Count the number of slices with percentages below the combine
+			// threshold; if it turns out to be just one, we won't combine.
+
+			for (var i = 0; i < data.length; ++i) {
+				var value = data[i].data[0][1];
+				if (value / total <= options.series.pie.combine.threshold) {
+					combined += value;
+					numCombined++;
+					if (!color) {
+						color = data[i].color;
+					}
+				}
+			}
+
+			for (var i = 0; i < data.length; ++i) {
+				var value = data[i].data[0][1];
+				if (numCombined < 2 || value / total > options.series.pie.combine.threshold) {
+					newdata.push(
+						$.extend(data[i], {     /* extend to allow keeping all other original data values
+						                           and using them e.g. in labelFormatter. */
+							data: [[1, value]],
+							color: data[i].color,
+							label: data[i].label,
+							angle: value * Math.PI * 2 / total,
+							percent: value / (total / 100)
+						})
+					);
+				}
+			}
+
+			if (numCombined > 1) {
+				newdata.push({
+					data: [[1, combined]],
+					color: color,
+					label: options.series.pie.combine.label,
+					angle: combined * Math.PI * 2 / total,
+					percent: combined / (total / 100)
+				});
+			}
+
+			return newdata;
+		}
+
+		function draw(plot, newCtx) {
+
+			if (!target) {
+				return; // if no series were passed
+			}
+
+			var canvasWidth = plot.getPlaceholder().width(),
+				canvasHeight = plot.getPlaceholder().height(),
+				legendWidth = target.children().filter(".legend").children().width() || 0;
+
+			ctx = newCtx;
+
+			// WARNING: HACK! REWRITE THIS CODE AS SOON AS POSSIBLE!
+
+			// When combining smaller slices into an 'other' slice, we need to
+			// add a new series.  Since Flot gives plugins no way to modify the
+			// list of series, the pie plugin uses a hack where the first call
+			// to processDatapoints results in a call to setData with the new
+			// list of series, then subsequent processDatapoints do nothing.
+
+			// The plugin-global 'processed' flag is used to control this hack;
+			// it starts out false, and is set to true after the first call to
+			// processDatapoints.
+
+			// Unfortunately this turns future setData calls into no-ops; they
+			// call processDatapoints, the flag is true, and nothing happens.
+
+			// To fix this we'll set the flag back to false here in draw, when
+			// all series have been processed, so the next sequence of calls to
+			// processDatapoints once again starts out with a slice-combine.
+			// This is really a hack; in 0.9 we need to give plugins a proper
+			// way to modify series before any processing begins.
+
+			processed = false;
+
+			// calculate maximum radius and center point
+
+			maxRadius =  Math.min(canvasWidth, canvasHeight / options.series.pie.tilt) / 2;
+			centerTop = canvasHeight / 2 + options.series.pie.offset.top;
+			centerLeft = canvasWidth / 2;
+
+			if (options.series.pie.offset.left == "auto") {
+				if (options.legend.position.match("w")) {
+					centerLeft += legendWidth / 2;
+				} else {
+					centerLeft -= legendWidth / 2;
+				}
+				if (centerLeft < maxRadius) {
+					centerLeft = maxRadius;
+				} else if (centerLeft > canvasWidth - maxRadius) {
+					centerLeft = canvasWidth - maxRadius;
+				}
+			} else {
+				centerLeft += options.series.pie.offset.left;
+			}
+
+			var slices = plot.getData(),
+				attempts = 0;
+
+			// Keep shrinking the pie's radius until drawPie returns true,
+			// indicating that all the labels fit, or we try too many times.
+
+			do {
+				if (attempts > 0) {
+					maxRadius *= REDRAW_SHRINK;
+				}
+				attempts += 1;
+				clear();
+				if (options.series.pie.tilt <= 0.8) {
+					drawShadow();
+				}
+			} while (!drawPie() && attempts < REDRAW_ATTEMPTS)
+
+			if (attempts >= REDRAW_ATTEMPTS) {
+				clear();
+				target.prepend("Could not draw pie with labels contained inside canvas
");
+			}
+
+			if (plot.setSeries && plot.insertLegend) {
+				plot.setSeries(slices);
+				plot.insertLegend();
+			}
+
+			// we're actually done at this point, just defining internal functions at this point
+
+			function clear() {
+				ctx.clearRect(0, 0, canvasWidth, canvasHeight);
+				target.children().filter(".pieLabel, .pieLabelBackground").remove();
+			}
+
+			function drawShadow() {
+
+				var shadowLeft = options.series.pie.shadow.left;
+				var shadowTop = options.series.pie.shadow.top;
+				var edge = 10;
+				var alpha = options.series.pie.shadow.alpha;
+				var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
+
+				if (radius >= canvasWidth / 2 - shadowLeft || radius * options.series.pie.tilt >= canvasHeight / 2 - shadowTop || radius <= edge) {
+					return;	// shadow would be outside canvas, so don't draw it
+				}
+
+				ctx.save();
+				ctx.translate(shadowLeft,shadowTop);
+				ctx.globalAlpha = alpha;
+				ctx.fillStyle = "#000";
+
+				// center and rotate to starting position
+
+				ctx.translate(centerLeft,centerTop);
+				ctx.scale(1, options.series.pie.tilt);
+
+				//radius -= edge;
+
+				for (var i = 1; i <= edge; i++) {
+					ctx.beginPath();
+					ctx.arc(0, 0, radius, 0, Math.PI * 2, false);
+					ctx.fill();
+					radius -= i;
+				}
+
+				ctx.restore();
+			}
+
+			function drawPie() {
+
+				var startAngle = Math.PI * options.series.pie.startAngle;
+				var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
+
+				// center and rotate to starting position
+
+				ctx.save();
+				ctx.translate(centerLeft,centerTop);
+				ctx.scale(1, options.series.pie.tilt);
+				//ctx.rotate(startAngle); // start at top; -- This doesn't work properly in Opera
+
+				// draw slices
+
+				ctx.save();
+				var currentAngle = startAngle;
+				for (var i = 0; i < slices.length; ++i) {
+					slices[i].startAngle = currentAngle;
+					drawSlice(slices[i].angle, slices[i].color, true);
+				}
+				ctx.restore();
+
+				// draw slice outlines
+
+				if (options.series.pie.stroke.width > 0) {
+					ctx.save();
+					ctx.lineWidth = options.series.pie.stroke.width;
+					currentAngle = startAngle;
+					for (var i = 0; i < slices.length; ++i) {
+						drawSlice(slices[i].angle, options.series.pie.stroke.color, false);
+					}
+					ctx.restore();
+				}
+
+				// draw donut hole
+
+				drawDonutHole(ctx);
+
+				ctx.restore();
+
+				// Draw the labels, returning true if they fit within the plot
+
+				if (options.series.pie.label.show) {
+					return drawLabels();
+				} else return true;
+
+				function drawSlice(angle, color, fill) {
+
+					if (angle <= 0 || isNaN(angle)) {
+						return;
+					}
+
+					if (fill) {
+						ctx.fillStyle = color;
+					} else {
+						ctx.strokeStyle = color;
+						ctx.lineJoin = "round";
+					}
+
+					ctx.beginPath();
+					if (Math.abs(angle - Math.PI * 2) > 0.000000001) {
+						ctx.moveTo(0, 0); // Center of the pie
+					}
+
+					//ctx.arc(0, 0, radius, 0, angle, false); // This doesn't work properly in Opera
+					ctx.arc(0, 0, radius,currentAngle, currentAngle + angle / 2, false);
+					ctx.arc(0, 0, radius,currentAngle + angle / 2, currentAngle + angle, false);
+					ctx.closePath();
+					//ctx.rotate(angle); // This doesn't work properly in Opera
+					currentAngle += angle;
+
+					if (fill) {
+						ctx.fill();
+					} else {
+						ctx.stroke();
+					}
+				}
+
+				function drawLabels() {
+
+					var currentAngle = startAngle;
+					var radius = options.series.pie.label.radius > 1 ? options.series.pie.label.radius : maxRadius * options.series.pie.label.radius;
+
+					for (var i = 0; i < slices.length; ++i) {
+						if (slices[i].percent >= options.series.pie.label.threshold * 100) {
+							if (!drawLabel(slices[i], currentAngle, i)) {
+								return false;
+							}
+						}
+						currentAngle += slices[i].angle;
+					}
+
+					return true;
+
+					function drawLabel(slice, startAngle, index) {
+
+						if (slice.data[0][1] == 0) {
+							return true;
+						}
+
+						// format label text
+
+						var lf = options.legend.labelFormatter, text, plf = options.series.pie.label.formatter;
+
+						if (lf) {
+							text = lf(slice.label, slice);
+						} else {
+							text = slice.label;
+						}
+
+						if (plf) {
+							text = plf(text, slice);
+						}
+
+						var halfAngle = ((startAngle + slice.angle) + startAngle) / 2;
+						var x = centerLeft + Math.round(Math.cos(halfAngle) * radius);
+						var y = centerTop + Math.round(Math.sin(halfAngle) * radius) * options.series.pie.tilt;
+
+						var html = "" + text + "";
+						target.append(html);
+
+						var label = target.children("#pieLabel" + index);
+						var labelTop = (y - label.height() / 2);
+						var labelLeft = (x - label.width() / 2);
+
+						label.css("top", labelTop);
+						label.css("left", labelLeft);
+
+						// check to make sure that the label is not outside the canvas
+
+						if (0 - labelTop > 0 || 0 - labelLeft > 0 || canvasHeight - (labelTop + label.height()) < 0 || canvasWidth - (labelLeft + label.width()) < 0) {
+							return false;
+						}
+
+						if (options.series.pie.label.background.opacity != 0) {
+
+							// put in the transparent background separately to avoid blended labels and label boxes
+
+							var c = options.series.pie.label.background.color;
+
+							if (c == null) {
+								c = slice.color;
+							}
+
+							var pos = "top:" + labelTop + "px;left:" + labelLeft + "px;";
+							$("")
+								.css("opacity", options.series.pie.label.background.opacity)
+								.insertBefore(label);
+						}
+
+						return true;
+					} // end individual label function
+				} // end drawLabels function
+			} // end drawPie function
+		} // end draw function
+
+		// Placed here because it needs to be accessed from multiple locations
+
+		function drawDonutHole(layer) {
+			if (options.series.pie.innerRadius > 0) {
+
+				// subtract the center
+
+				layer.save();
+				var innerRadius = options.series.pie.innerRadius > 1 ? options.series.pie.innerRadius : maxRadius * options.series.pie.innerRadius;
+				layer.globalCompositeOperation = "destination-out"; // this does not work with excanvas, but it will fall back to using the stroke color
+				layer.beginPath();
+				layer.fillStyle = options.series.pie.stroke.color;
+				layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false);
+				layer.fill();
+				layer.closePath();
+				layer.restore();
+
+				// add inner stroke
+
+				layer.save();
+				layer.beginPath();
+				layer.strokeStyle = options.series.pie.stroke.color;
+				layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false);
+				layer.stroke();
+				layer.closePath();
+				layer.restore();
+
+				// TODO: add extra shadow inside hole (with a mask) if the pie is tilted.
+			}
+		}
+
+		//-- Additional Interactive related functions --
+
+		function isPointInPoly(poly, pt) {
+			for(var c = false, i = -1, l = poly.length, j = l - 1; ++i < l; j = i)
+				((poly[i][1] <= pt[1] && pt[1] < poly[j][1]) || (poly[j][1] <= pt[1] && pt[1]< poly[i][1]))
+				&& (pt[0] < (poly[j][0] - poly[i][0]) * (pt[1] - poly[i][1]) / (poly[j][1] - poly[i][1]) + poly[i][0])
+				&& (c = !c);
+			return c;
+		}
+
+		function findNearbySlice(mouseX, mouseY) {
+
+			var slices = plot.getData(),
+				options = plot.getOptions(),
+				radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius,
+				x, y;
+
+			for (var i = 0; i < slices.length; ++i) {
+
+				var s = slices[i];
+
+				if (s.pie.show) {
+
+					ctx.save();
+					ctx.beginPath();
+					ctx.moveTo(0, 0); // Center of the pie
+					//ctx.scale(1, options.series.pie.tilt);	// this actually seems to break everything when here.
+					ctx.arc(0, 0, radius, s.startAngle, s.startAngle + s.angle / 2, false);
+					ctx.arc(0, 0, radius, s.startAngle + s.angle / 2, s.startAngle + s.angle, false);
+					ctx.closePath();
+					x = mouseX - centerLeft;
+					y = mouseY - centerTop;
+
+					if (ctx.isPointInPath) {
+						if (ctx.isPointInPath(mouseX - centerLeft, mouseY - centerTop)) {
+							ctx.restore();
+							return {
+								datapoint: [s.percent, s.data],
+								dataIndex: 0,
+								series: s,
+								seriesIndex: i
+							};
+						}
+					} else {
+
+						// excanvas for IE doesn;t support isPointInPath, this is a workaround.
+
+						var p1X = radius * Math.cos(s.startAngle),
+							p1Y = radius * Math.sin(s.startAngle),
+							p2X = radius * Math.cos(s.startAngle + s.angle / 4),
+							p2Y = radius * Math.sin(s.startAngle + s.angle / 4),
+							p3X = radius * Math.cos(s.startAngle + s.angle / 2),
+							p3Y = radius * Math.sin(s.startAngle + s.angle / 2),
+							p4X = radius * Math.cos(s.startAngle + s.angle / 1.5),
+							p4Y = radius * Math.sin(s.startAngle + s.angle / 1.5),
+							p5X = radius * Math.cos(s.startAngle + s.angle),
+							p5Y = radius * Math.sin(s.startAngle + s.angle),
+							arrPoly = [[0, 0], [p1X, p1Y], [p2X, p2Y], [p3X, p3Y], [p4X, p4Y], [p5X, p5Y]],
+							arrPoint = [x, y];
+
+						// TODO: perhaps do some mathmatical trickery here with the Y-coordinate to compensate for pie tilt?
+
+						if (isPointInPoly(arrPoly, arrPoint)) {
+							ctx.restore();
+							return {
+								datapoint: [s.percent, s.data],
+								dataIndex: 0,
+								series: s,
+								seriesIndex: i
+							};
+						}
+					}
+
+					ctx.restore();
+				}
+			}
+
+			return null;
+		}
+
+		function onMouseMove(e) {
+			triggerClickHoverEvent("plothover", e);
+		}
+
+		function onClick(e) {
+			triggerClickHoverEvent("plotclick", e);
+		}
+
+		// trigger click or hover event (they send the same parameters so we share their code)
+
+		function triggerClickHoverEvent(eventname, e) {
+
+			var offset = plot.offset();
+			var canvasX = parseInt(e.pageX - offset.left);
+			var canvasY =  parseInt(e.pageY - offset.top);
+			var item = findNearbySlice(canvasX, canvasY);
+
+			if (options.grid.autoHighlight) {
+
+				// clear auto-highlights
+
+				for (var i = 0; i < highlights.length; ++i) {
+					var h = highlights[i];
+					if (h.auto == eventname && !(item && h.series == item.series)) {
+						unhighlight(h.series);
+					}
+				}
+			}
+
+			// highlight the slice
+
+			if (item) {
+				highlight(item.series, eventname);
+			}
+
+			// trigger any hover bind events
+
+			var pos = { pageX: e.pageX, pageY: e.pageY };
+			target.trigger(eventname, [pos, item]);
+		}
+
+		function highlight(s, auto) {
+			//if (typeof s == "number") {
+			//	s = series[s];
+			//}
+
+			var i = indexOfHighlight(s);
+
+			if (i == -1) {
+				highlights.push({ series: s, auto: auto });
+				plot.triggerRedrawOverlay();
+			} else if (!auto) {
+				highlights[i].auto = false;
+			}
+		}
+
+		function unhighlight(s) {
+			if (s == null) {
+				highlights = [];
+				plot.triggerRedrawOverlay();
+			}
+
+			//if (typeof s == "number") {
+			//	s = series[s];
+			//}
+
+			var i = indexOfHighlight(s);
+
+			if (i != -1) {
+				highlights.splice(i, 1);
+				plot.triggerRedrawOverlay();
+			}
+		}
+
+		function indexOfHighlight(s) {
+			for (var i = 0; i < highlights.length; ++i) {
+				var h = highlights[i];
+				if (h.series == s)
+					return i;
+			}
+			return -1;
+		}
+
+		function drawOverlay(plot, octx) {
+
+			var options = plot.getOptions();
+
+			var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
+
+			octx.save();
+			octx.translate(centerLeft, centerTop);
+			octx.scale(1, options.series.pie.tilt);
+
+			for (var i = 0; i < highlights.length; ++i) {
+				drawHighlight(highlights[i].series);
+			}
+
+			drawDonutHole(octx);
+
+			octx.restore();
+
+			function drawHighlight(series) {
+
+				if (series.angle <= 0 || isNaN(series.angle)) {
+					return;
+				}
+
+				//octx.fillStyle = parseColor(options.series.pie.highlight.color).scale(null, null, null, options.series.pie.highlight.opacity).toString();
+				octx.fillStyle = "rgba(255, 255, 255, " + options.series.pie.highlight.opacity + ")"; // this is temporary until we have access to parseColor
+				octx.beginPath();
+				if (Math.abs(series.angle - Math.PI * 2) > 0.000000001) {
+					octx.moveTo(0, 0); // Center of the pie
+				}
+				octx.arc(0, 0, radius, series.startAngle, series.startAngle + series.angle / 2, false);
+				octx.arc(0, 0, radius, series.startAngle + series.angle / 2, series.startAngle + series.angle, false);
+				octx.closePath();
+				octx.fill();
+			}
+		}
+	} // end init (plugin body)
+
+	// define pie specific options and their default values
+
+	var options = {
+		series: {
+			pie: {
+				show: false,
+				radius: "auto",	// actual radius of the visible pie (based on full calculated radius if <=1, or hard pixel value)
+				innerRadius: 0, /* for donut */
+				startAngle: 3/2,
+				tilt: 1,
+				shadow: {
+					left: 5,	// shadow left offset
+					top: 15,	// shadow top offset
+					alpha: 0.02	// shadow alpha
+				},
+				offset: {
+					top: 0,
+					left: "auto"
+				},
+				stroke: {
+					color: "#fff",
+					width: 1
+				},
+				label: {
+					show: "auto",
+					formatter: function(label, slice) {
+						return "" + label + "
" + Math.round(slice.percent) + "%
";
+					},	// formatter function
+					radius: 1,	// radius at which to place the labels (based on full calculated radius if <=1, or hard pixel value)
+					background: {
+						color: null,
+						opacity: 0
+					},
+					threshold: 0	// percentage at which to hide the label (i.e. the slice is too narrow)
+				},
+				combine: {
+					threshold: -1,	// percentage at which to combine little slices into one larger slice
+					color: null,	// color to give the new slice (auto-generated if null)
+					label: "Other"	// label to give the new slice
+				},
+				highlight: {
+					//color: "#fff",		// will add this functionality once parseColor is available
+					opacity: 0.5
+				}
+			}
+		}
+	};
+
+	$.plot.plugins.push({
+		init: init,
+		options: options,
+		name: "pie",
+		version: "1.1"
+	});
+
+})(jQuery);
diff --git a/hledger-web/static/js/jquery.flot.pie.min.js b/hledger-web/static/js/jquery.flot.pie.min.js
new file mode 100644
index 000000000..9bc488b15
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.pie.min.js
@@ -0,0 +1,7 @@
+/* Javascript plotting library for jQuery, version 0.8.3.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/
+(function($){var REDRAW_ATTEMPTS=10;var REDRAW_SHRINK=.95;function init(plot){var canvas=null,target=null,options=null,maxRadius=null,centerLeft=null,centerTop=null,processed=false,ctx=null;var highlights=[];plot.hooks.processOptions.push(function(plot,options){if(options.series.pie.show){options.grid.show=false;if(options.series.pie.label.show=="auto"){if(options.legend.show){options.series.pie.label.show=false}else{options.series.pie.label.show=true}}if(options.series.pie.radius=="auto"){if(options.series.pie.label.show){options.series.pie.radius=3/4}else{options.series.pie.radius=1}}if(options.series.pie.tilt>1){options.series.pie.tilt=1}else if(options.series.pie.tilt<0){options.series.pie.tilt=0}}});plot.hooks.bindEvents.push(function(plot,eventHolder){var options=plot.getOptions();if(options.series.pie.show){if(options.grid.hoverable){eventHolder.unbind("mousemove").mousemove(onMouseMove)}if(options.grid.clickable){eventHolder.unbind("click").click(onClick)}}});plot.hooks.processDatapoints.push(function(plot,series,data,datapoints){var options=plot.getOptions();if(options.series.pie.show){processDatapoints(plot,series,data,datapoints)}});plot.hooks.drawOverlay.push(function(plot,octx){var options=plot.getOptions();if(options.series.pie.show){drawOverlay(plot,octx)}});plot.hooks.draw.push(function(plot,newCtx){var options=plot.getOptions();if(options.series.pie.show){draw(plot,newCtx)}});function processDatapoints(plot,series,datapoints){if(!processed){processed=true;canvas=plot.getCanvas();target=$(canvas).parent();options=plot.getOptions();plot.setData(combine(plot.getData()))}}function combine(data){var total=0,combined=0,numCombined=0,color=options.series.pie.combine.color,newdata=[];for(var i=0;ioptions.series.pie.combine.threshold){newdata.push($.extend(data[i],{data:[[1,value]],color:data[i].color,label:data[i].label,angle:value*Math.PI*2/total,percent:value/(total/100)}))}}if(numCombined>1){newdata.push({data:[[1,combined]],color:color,label:options.series.pie.combine.label,angle:combined*Math.PI*2/total,percent:combined/(total/100)})}return newdata}function draw(plot,newCtx){if(!target){return}var canvasWidth=plot.getPlaceholder().width(),canvasHeight=plot.getPlaceholder().height(),legendWidth=target.children().filter(".legend").children().width()||0;ctx=newCtx;processed=false;maxRadius=Math.min(canvasWidth,canvasHeight/options.series.pie.tilt)/2;centerTop=canvasHeight/2+options.series.pie.offset.top;centerLeft=canvasWidth/2;if(options.series.pie.offset.left=="auto"){if(options.legend.position.match("w")){centerLeft+=legendWidth/2}else{centerLeft-=legendWidth/2}if(centerLeftcanvasWidth-maxRadius){centerLeft=canvasWidth-maxRadius}}else{centerLeft+=options.series.pie.offset.left}var slices=plot.getData(),attempts=0;do{if(attempts>0){maxRadius*=REDRAW_SHRINK}attempts+=1;clear();if(options.series.pie.tilt<=.8){drawShadow()}}while(!drawPie()&&attempts=REDRAW_ATTEMPTS){clear();target.prepend("Could not draw pie with labels contained inside canvas
")}if(plot.setSeries&&plot.insertLegend){plot.setSeries(slices);plot.insertLegend()}function clear(){ctx.clearRect(0,0,canvasWidth,canvasHeight);target.children().filter(".pieLabel, .pieLabelBackground").remove()}function drawShadow(){var shadowLeft=options.series.pie.shadow.left;var shadowTop=options.series.pie.shadow.top;var edge=10;var alpha=options.series.pie.shadow.alpha;var radius=options.series.pie.radius>1?options.series.pie.radius:maxRadius*options.series.pie.radius;if(radius>=canvasWidth/2-shadowLeft||radius*options.series.pie.tilt>=canvasHeight/2-shadowTop||radius<=edge){return}ctx.save();ctx.translate(shadowLeft,shadowTop);ctx.globalAlpha=alpha;ctx.fillStyle="#000";ctx.translate(centerLeft,centerTop);ctx.scale(1,options.series.pie.tilt);for(var i=1;i<=edge;i++){ctx.beginPath();ctx.arc(0,0,radius,0,Math.PI*2,false);ctx.fill();radius-=i}ctx.restore()}function drawPie(){var startAngle=Math.PI*options.series.pie.startAngle;var radius=options.series.pie.radius>1?options.series.pie.radius:maxRadius*options.series.pie.radius;ctx.save();ctx.translate(centerLeft,centerTop);ctx.scale(1,options.series.pie.tilt);ctx.save();var currentAngle=startAngle;for(var i=0;i0){ctx.save();ctx.lineWidth=options.series.pie.stroke.width;currentAngle=startAngle;for(var i=0;i1e-9){ctx.moveTo(0,0)}ctx.arc(0,0,radius,currentAngle,currentAngle+angle/2,false);ctx.arc(0,0,radius,currentAngle+angle/2,currentAngle+angle,false);ctx.closePath();currentAngle+=angle;if(fill){ctx.fill()}else{ctx.stroke()}}function drawLabels(){var currentAngle=startAngle;var radius=options.series.pie.label.radius>1?options.series.pie.label.radius:maxRadius*options.series.pie.label.radius;for(var i=0;i=options.series.pie.label.threshold*100){if(!drawLabel(slices[i],currentAngle,i)){return false}}currentAngle+=slices[i].angle}return true;function drawLabel(slice,startAngle,index){if(slice.data[0][1]==0){return true}var lf=options.legend.labelFormatter,text,plf=options.series.pie.label.formatter;if(lf){text=lf(slice.label,slice)}else{text=slice.label}if(plf){text=plf(text,slice)}var halfAngle=(startAngle+slice.angle+startAngle)/2;var x=centerLeft+Math.round(Math.cos(halfAngle)*radius);var y=centerTop+Math.round(Math.sin(halfAngle)*radius)*options.series.pie.tilt;var html=""+text+"";target.append(html);var label=target.children("#pieLabel"+index);var labelTop=y-label.height()/2;var labelLeft=x-label.width()/2;label.css("top",labelTop);label.css("left",labelLeft);if(0-labelTop>0||0-labelLeft>0||canvasHeight-(labelTop+label.height())<0||canvasWidth-(labelLeft+label.width())<0){return false}if(options.series.pie.label.background.opacity!=0){var c=options.series.pie.label.background.color;if(c==null){c=slice.color}var pos="top:"+labelTop+"px;left:"+labelLeft+"px;";$("").css("opacity",options.series.pie.label.background.opacity).insertBefore(label)}return true}}}}function drawDonutHole(layer){if(options.series.pie.innerRadius>0){layer.save();var innerRadius=options.series.pie.innerRadius>1?options.series.pie.innerRadius:maxRadius*options.series.pie.innerRadius;layer.globalCompositeOperation="destination-out";layer.beginPath();layer.fillStyle=options.series.pie.stroke.color;layer.arc(0,0,innerRadius,0,Math.PI*2,false);layer.fill();layer.closePath();layer.restore();layer.save();layer.beginPath();layer.strokeStyle=options.series.pie.stroke.color;layer.arc(0,0,innerRadius,0,Math.PI*2,false);layer.stroke();layer.closePath();layer.restore()}}function isPointInPoly(poly,pt){for(var c=false,i=-1,l=poly.length,j=l-1;++i1?options.series.pie.radius:maxRadius*options.series.pie.radius,x,y;for(var i=0;i1?options.series.pie.radius:maxRadius*options.series.pie.radius;octx.save();octx.translate(centerLeft,centerTop);octx.scale(1,options.series.pie.tilt);for(var i=0;i1e-9){octx.moveTo(0,0)}octx.arc(0,0,radius,series.startAngle,series.startAngle+series.angle/2,false);octx.arc(0,0,radius,series.startAngle+series.angle/2,series.startAngle+series.angle,false);octx.closePath();octx.fill()}}}var options={series:{pie:{show:false,radius:"auto",innerRadius:0,startAngle:3/2,tilt:1,shadow:{left:5,top:15,alpha:.02},offset:{top:0,left:"auto"},stroke:{color:"#fff",width:1},label:{show:"auto",formatter:function(label,slice){return""+label+"
"+Math.round(slice.percent)+"%
"},radius:1,background:{color:null,opacity:0},threshold:0},combine:{threshold:-1,color:null,label:"Other"},highlight:{opacity:.5}}}};$.plot.plugins.push({init:init,options:options,name:"pie",version:"1.1"})})(jQuery);
\ No newline at end of file
diff --git a/hledger-web/static/js/jquery.flot.resize.js b/hledger-web/static/js/jquery.flot.resize.js
new file mode 100644
index 000000000..8a626dda0
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.resize.js
@@ -0,0 +1,59 @@
+/* Flot plugin for automatically redrawing plots as the placeholder resizes.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+It works by listening for changes on the placeholder div (through the jQuery
+resize event plugin) - if the size changes, it will redraw the plot.
+
+There are no options. If you need to disable the plugin for some plots, you
+can just fix the size of their placeholders.
+
+*/
+
+/* Inline dependency:
+ * jQuery resize event - v1.1 - 3/14/2010
+ * http://benalman.com/projects/jquery-resize-plugin/
+ *
+ * Copyright (c) 2010 "Cowboy" Ben Alman
+ * Dual licensed under the MIT and GPL licenses.
+ * http://benalman.com/about/license/
+ */
+(function($,e,t){"$:nomunge";var i=[],n=$.resize=$.extend($.resize,{}),a,r=false,s="setTimeout",u="resize",m=u+"-special-event",o="pendingDelay",l="activeDelay",f="throttleWindow";n[o]=200;n[l]=20;n[f]=true;$.event.special[u]={setup:function(){if(!n[f]&&this[s]){return false}var e=$(this);i.push(this);e.data(m,{w:e.width(),h:e.height()});if(i.length===1){a=t;h()}},teardown:function(){if(!n[f]&&this[s]){return false}var e=$(this);for(var t=i.length-1;t>=0;t--){if(i[t]==this){i.splice(t,1);break}}e.removeData(m);if(!i.length){if(r){cancelAnimationFrame(a)}else{clearTimeout(a)}a=null}},add:function(e){if(!n[f]&&this[s]){return false}var i;function a(e,n,a){var r=$(this),s=r.data(m)||{};s.w=n!==t?n:r.width();s.h=a!==t?a:r.height();i.apply(this,arguments)}if($.isFunction(e)){i=e;return a}else{i=e.handler;e.handler=a}}};function h(t){if(r===true){r=t||1}for(var s=i.length-1;s>=0;s--){var l=$(i[s]);if(l[0]==e||l.is(":visible")){var f=l.width(),c=l.height(),d=l.data(m);if(d&&(f!==d.w||c!==d.h)){l.trigger(u,[d.w=f,d.h=c]);r=t||true}}else{d=l.data(m);d.w=0;d.h=0}}if(a!==null){if(r&&(t==null||t-r<1e3)){a=e.requestAnimationFrame(h)}else{a=setTimeout(h,n[o]);r=false}}}if(!e.requestAnimationFrame){e.requestAnimationFrame=function(){return e.webkitRequestAnimationFrame||e.mozRequestAnimationFrame||e.oRequestAnimationFrame||e.msRequestAnimationFrame||function(t,i){return e.setTimeout(function(){t((new Date).getTime())},n[l])}}()}if(!e.cancelAnimationFrame){e.cancelAnimationFrame=function(){return e.webkitCancelRequestAnimationFrame||e.mozCancelRequestAnimationFrame||e.oCancelRequestAnimationFrame||e.msCancelRequestAnimationFrame||clearTimeout}()}})(jQuery,this);
+
+(function ($) {
+    var options = { }; // no options
+
+    function init(plot) {
+        function onResize() {
+            var placeholder = plot.getPlaceholder();
+
+            // somebody might have hidden us and we can't plot
+            // when we don't have the dimensions
+            if (placeholder.width() == 0 || placeholder.height() == 0)
+                return;
+
+            plot.resize();
+            plot.setupGrid();
+            plot.draw();
+        }
+        
+        function bindEvents(plot, eventHolder) {
+            plot.getPlaceholder().resize(onResize);
+        }
+
+        function shutdown(plot, eventHolder) {
+            plot.getPlaceholder().unbind("resize", onResize);
+        }
+        
+        plot.hooks.bindEvents.push(bindEvents);
+        plot.hooks.shutdown.push(shutdown);
+    }
+    
+    $.plot.plugins.push({
+        init: init,
+        options: options,
+        name: 'resize',
+        version: '1.0'
+    });
+})(jQuery);
diff --git a/hledger-web/static/js/jquery.flot.resize.min.js b/hledger-web/static/js/jquery.flot.resize.min.js
new file mode 100644
index 000000000..7e92aa681
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.resize.min.js
@@ -0,0 +1,7 @@
+/* Javascript plotting library for jQuery, version 0.8.3.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/
+(function($,e,t){"$:nomunge";var i=[],n=$.resize=$.extend($.resize,{}),a,r=false,s="setTimeout",u="resize",m=u+"-special-event",o="pendingDelay",l="activeDelay",f="throttleWindow";n[o]=200;n[l]=20;n[f]=true;$.event.special[u]={setup:function(){if(!n[f]&&this[s]){return false}var e=$(this);i.push(this);e.data(m,{w:e.width(),h:e.height()});if(i.length===1){a=t;h()}},teardown:function(){if(!n[f]&&this[s]){return false}var e=$(this);for(var t=i.length-1;t>=0;t--){if(i[t]==this){i.splice(t,1);break}}e.removeData(m);if(!i.length){if(r){cancelAnimationFrame(a)}else{clearTimeout(a)}a=null}},add:function(e){if(!n[f]&&this[s]){return false}var i;function a(e,n,a){var r=$(this),s=r.data(m)||{};s.w=n!==t?n:r.width();s.h=a!==t?a:r.height();i.apply(this,arguments)}if($.isFunction(e)){i=e;return a}else{i=e.handler;e.handler=a}}};function h(t){if(r===true){r=t||1}for(var s=i.length-1;s>=0;s--){var l=$(i[s]);if(l[0]==e||l.is(":visible")){var f=l.width(),c=l.height(),d=l.data(m);if(d&&(f!==d.w||c!==d.h)){l.trigger(u,[d.w=f,d.h=c]);r=t||true}}else{d=l.data(m);d.w=0;d.h=0}}if(a!==null){if(r&&(t==null||t-r<1e3)){a=e.requestAnimationFrame(h)}else{a=setTimeout(h,n[o]);r=false}}}if(!e.requestAnimationFrame){e.requestAnimationFrame=function(){return e.webkitRequestAnimationFrame||e.mozRequestAnimationFrame||e.oRequestAnimationFrame||e.msRequestAnimationFrame||function(t,i){return e.setTimeout(function(){t((new Date).getTime())},n[l])}}()}if(!e.cancelAnimationFrame){e.cancelAnimationFrame=function(){return e.webkitCancelRequestAnimationFrame||e.mozCancelRequestAnimationFrame||e.oCancelRequestAnimationFrame||e.msCancelRequestAnimationFrame||clearTimeout}()}})(jQuery,this);(function($){var options={};function init(plot){function onResize(){var placeholder=plot.getPlaceholder();if(placeholder.width()==0||placeholder.height()==0)return;plot.resize();plot.setupGrid();plot.draw()}function bindEvents(plot,eventHolder){plot.getPlaceholder().resize(onResize)}function shutdown(plot,eventHolder){plot.getPlaceholder().unbind("resize",onResize)}plot.hooks.bindEvents.push(bindEvents);plot.hooks.shutdown.push(shutdown)}$.plot.plugins.push({init:init,options:options,name:"resize",version:"1.0"})})(jQuery);
\ No newline at end of file
diff --git a/hledger-web/static/js/jquery.flot.selection.js b/hledger-web/static/js/jquery.flot.selection.js
new file mode 100644
index 000000000..d3c20fa4e
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.selection.js
@@ -0,0 +1,360 @@
+/* Flot plugin for selecting regions of a plot.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+The plugin supports these options:
+
+selection: {
+	mode: null or "x" or "y" or "xy",
+	color: color,
+	shape: "round" or "miter" or "bevel",
+	minSize: number of pixels
+}
+
+Selection support is enabled by setting the mode to one of "x", "y" or "xy".
+In "x" mode, the user will only be able to specify the x range, similarly for
+"y" mode. For "xy", the selection becomes a rectangle where both ranges can be
+specified. "color" is color of the selection (if you need to change the color
+later on, you can get to it with plot.getOptions().selection.color). "shape"
+is the shape of the corners of the selection.
+
+"minSize" is the minimum size a selection can be in pixels. This value can
+be customized to determine the smallest size a selection can be and still
+have the selection rectangle be displayed. When customizing this value, the
+fact that it refers to pixels, not axis units must be taken into account.
+Thus, for example, if there is a bar graph in time mode with BarWidth set to 1
+minute, setting "minSize" to 1 will not make the minimum selection size 1
+minute, but rather 1 pixel. Note also that setting "minSize" to 0 will prevent
+"plotunselected" events from being fired when the user clicks the mouse without
+dragging.
+
+When selection support is enabled, a "plotselected" event will be emitted on
+the DOM element you passed into the plot function. The event handler gets a
+parameter with the ranges selected on the axes, like this:
+
+	placeholder.bind( "plotselected", function( event, ranges ) {
+		alert("You selected " + ranges.xaxis.from + " to " + ranges.xaxis.to)
+		// similar for yaxis - with multiple axes, the extra ones are in
+		// x2axis, x3axis, ...
+	});
+
+The "plotselected" event is only fired when the user has finished making the
+selection. A "plotselecting" event is fired during the process with the same
+parameters as the "plotselected" event, in case you want to know what's
+happening while it's happening,
+
+A "plotunselected" event with no arguments is emitted when the user clicks the
+mouse to remove the selection. As stated above, setting "minSize" to 0 will
+destroy this behavior.
+
+The plugin allso adds the following methods to the plot object:
+
+- setSelection( ranges, preventEvent )
+
+  Set the selection rectangle. The passed in ranges is on the same form as
+  returned in the "plotselected" event. If the selection mode is "x", you
+  should put in either an xaxis range, if the mode is "y" you need to put in
+  an yaxis range and both xaxis and yaxis if the selection mode is "xy", like
+  this:
+
+	setSelection({ xaxis: { from: 0, to: 10 }, yaxis: { from: 40, to: 60 } });
+
+  setSelection will trigger the "plotselected" event when called. If you don't
+  want that to happen, e.g. if you're inside a "plotselected" handler, pass
+  true as the second parameter. If you are using multiple axes, you can
+  specify the ranges on any of those, e.g. as x2axis/x3axis/... instead of
+  xaxis, the plugin picks the first one it sees.
+
+- clearSelection( preventEvent )
+
+  Clear the selection rectangle. Pass in true to avoid getting a
+  "plotunselected" event.
+
+- getSelection()
+
+  Returns the current selection in the same format as the "plotselected"
+  event. If there's currently no selection, the function returns null.
+
+*/
+
+(function ($) {
+    function init(plot) {
+        var selection = {
+                first: { x: -1, y: -1}, second: { x: -1, y: -1},
+                show: false,
+                active: false
+            };
+
+        // FIXME: The drag handling implemented here should be
+        // abstracted out, there's some similar code from a library in
+        // the navigation plugin, this should be massaged a bit to fit
+        // the Flot cases here better and reused. Doing this would
+        // make this plugin much slimmer.
+        var savedhandlers = {};
+
+        var mouseUpHandler = null;
+        
+        function onMouseMove(e) {
+            if (selection.active) {
+                updateSelection(e);
+                
+                plot.getPlaceholder().trigger("plotselecting", [ getSelection() ]);
+            }
+        }
+
+        function onMouseDown(e) {
+            if (e.which != 1)  // only accept left-click
+                return;
+            
+            // cancel out any text selections
+            document.body.focus();
+
+            // prevent text selection and drag in old-school browsers
+            if (document.onselectstart !== undefined && savedhandlers.onselectstart == null) {
+                savedhandlers.onselectstart = document.onselectstart;
+                document.onselectstart = function () { return false; };
+            }
+            if (document.ondrag !== undefined && savedhandlers.ondrag == null) {
+                savedhandlers.ondrag = document.ondrag;
+                document.ondrag = function () { return false; };
+            }
+
+            setSelectionPos(selection.first, e);
+
+            selection.active = true;
+
+            // this is a bit silly, but we have to use a closure to be
+            // able to whack the same handler again
+            mouseUpHandler = function (e) { onMouseUp(e); };
+            
+            $(document).one("mouseup", mouseUpHandler);
+        }
+
+        function onMouseUp(e) {
+            mouseUpHandler = null;
+            
+            // revert drag stuff for old-school browsers
+            if (document.onselectstart !== undefined)
+                document.onselectstart = savedhandlers.onselectstart;
+            if (document.ondrag !== undefined)
+                document.ondrag = savedhandlers.ondrag;
+
+            // no more dragging
+            selection.active = false;
+            updateSelection(e);
+
+            if (selectionIsSane())
+                triggerSelectedEvent();
+            else {
+                // this counts as a clear
+                plot.getPlaceholder().trigger("plotunselected", [ ]);
+                plot.getPlaceholder().trigger("plotselecting", [ null ]);
+            }
+
+            return false;
+        }
+
+        function getSelection() {
+            if (!selectionIsSane())
+                return null;
+            
+            if (!selection.show) return null;
+
+            var r = {}, c1 = selection.first, c2 = selection.second;
+            $.each(plot.getAxes(), function (name, axis) {
+                if (axis.used) {
+                    var p1 = axis.c2p(c1[axis.direction]), p2 = axis.c2p(c2[axis.direction]); 
+                    r[name] = { from: Math.min(p1, p2), to: Math.max(p1, p2) };
+                }
+            });
+            return r;
+        }
+
+        function triggerSelectedEvent() {
+            var r = getSelection();
+
+            plot.getPlaceholder().trigger("plotselected", [ r ]);
+
+            // backwards-compat stuff, to be removed in future
+            if (r.xaxis && r.yaxis)
+                plot.getPlaceholder().trigger("selected", [ { x1: r.xaxis.from, y1: r.yaxis.from, x2: r.xaxis.to, y2: r.yaxis.to } ]);
+        }
+
+        function clamp(min, value, max) {
+            return value < min ? min: (value > max ? max: value);
+        }
+
+        function setSelectionPos(pos, e) {
+            var o = plot.getOptions();
+            var offset = plot.getPlaceholder().offset();
+            var plotOffset = plot.getPlotOffset();
+            pos.x = clamp(0, e.pageX - offset.left - plotOffset.left, plot.width());
+            pos.y = clamp(0, e.pageY - offset.top - plotOffset.top, plot.height());
+
+            if (o.selection.mode == "y")
+                pos.x = pos == selection.first ? 0 : plot.width();
+
+            if (o.selection.mode == "x")
+                pos.y = pos == selection.first ? 0 : plot.height();
+        }
+
+        function updateSelection(pos) {
+            if (pos.pageX == null)
+                return;
+
+            setSelectionPos(selection.second, pos);
+            if (selectionIsSane()) {
+                selection.show = true;
+                plot.triggerRedrawOverlay();
+            }
+            else
+                clearSelection(true);
+        }
+
+        function clearSelection(preventEvent) {
+            if (selection.show) {
+                selection.show = false;
+                plot.triggerRedrawOverlay();
+                if (!preventEvent)
+                    plot.getPlaceholder().trigger("plotunselected", [ ]);
+            }
+        }
+
+        // function taken from markings support in Flot
+        function extractRange(ranges, coord) {
+            var axis, from, to, key, axes = plot.getAxes();
+
+            for (var k in axes) {
+                axis = axes[k];
+                if (axis.direction == coord) {
+                    key = coord + axis.n + "axis";
+                    if (!ranges[key] && axis.n == 1)
+                        key = coord + "axis"; // support x1axis as xaxis
+                    if (ranges[key]) {
+                        from = ranges[key].from;
+                        to = ranges[key].to;
+                        break;
+                    }
+                }
+            }
+
+            // backwards-compat stuff - to be removed in future
+            if (!ranges[key]) {
+                axis = coord == "x" ? plot.getXAxes()[0] : plot.getYAxes()[0];
+                from = ranges[coord + "1"];
+                to = ranges[coord + "2"];
+            }
+
+            // auto-reverse as an added bonus
+            if (from != null && to != null && from > to) {
+                var tmp = from;
+                from = to;
+                to = tmp;
+            }
+            
+            return { from: from, to: to, axis: axis };
+        }
+        
+        function setSelection(ranges, preventEvent) {
+            var axis, range, o = plot.getOptions();
+
+            if (o.selection.mode == "y") {
+                selection.first.x = 0;
+                selection.second.x = plot.width();
+            }
+            else {
+                range = extractRange(ranges, "x");
+
+                selection.first.x = range.axis.p2c(range.from);
+                selection.second.x = range.axis.p2c(range.to);
+            }
+
+            if (o.selection.mode == "x") {
+                selection.first.y = 0;
+                selection.second.y = plot.height();
+            }
+            else {
+                range = extractRange(ranges, "y");
+
+                selection.first.y = range.axis.p2c(range.from);
+                selection.second.y = range.axis.p2c(range.to);
+            }
+
+            selection.show = true;
+            plot.triggerRedrawOverlay();
+            if (!preventEvent && selectionIsSane())
+                triggerSelectedEvent();
+        }
+
+        function selectionIsSane() {
+            var minSize = plot.getOptions().selection.minSize;
+            return Math.abs(selection.second.x - selection.first.x) >= minSize &&
+                Math.abs(selection.second.y - selection.first.y) >= minSize;
+        }
+
+        plot.clearSelection = clearSelection;
+        plot.setSelection = setSelection;
+        plot.getSelection = getSelection;
+
+        plot.hooks.bindEvents.push(function(plot, eventHolder) {
+            var o = plot.getOptions();
+            if (o.selection.mode != null) {
+                eventHolder.mousemove(onMouseMove);
+                eventHolder.mousedown(onMouseDown);
+            }
+        });
+
+
+        plot.hooks.drawOverlay.push(function (plot, ctx) {
+            // draw selection
+            if (selection.show && selectionIsSane()) {
+                var plotOffset = plot.getPlotOffset();
+                var o = plot.getOptions();
+
+                ctx.save();
+                ctx.translate(plotOffset.left, plotOffset.top);
+
+                var c = $.color.parse(o.selection.color);
+
+                ctx.strokeStyle = c.scale('a', 0.8).toString();
+                ctx.lineWidth = 1;
+                ctx.lineJoin = o.selection.shape;
+                ctx.fillStyle = c.scale('a', 0.4).toString();
+
+                var x = Math.min(selection.first.x, selection.second.x) + 0.5,
+                    y = Math.min(selection.first.y, selection.second.y) + 0.5,
+                    w = Math.abs(selection.second.x - selection.first.x) - 1,
+                    h = Math.abs(selection.second.y - selection.first.y) - 1;
+
+                ctx.fillRect(x, y, w, h);
+                ctx.strokeRect(x, y, w, h);
+
+                ctx.restore();
+            }
+        });
+        
+        plot.hooks.shutdown.push(function (plot, eventHolder) {
+            eventHolder.unbind("mousemove", onMouseMove);
+            eventHolder.unbind("mousedown", onMouseDown);
+            
+            if (mouseUpHandler)
+                $(document).unbind("mouseup", mouseUpHandler);
+        });
+
+    }
+
+    $.plot.plugins.push({
+        init: init,
+        options: {
+            selection: {
+                mode: null, // one of null, "x", "y" or "xy"
+                color: "#e8cfac",
+                shape: "round", // one of "round", "miter", or "bevel"
+                minSize: 5 // minimum number of pixels
+            }
+        },
+        name: 'selection',
+        version: '1.1'
+    });
+})(jQuery);
diff --git a/hledger-web/static/js/jquery.flot.selection.min.js b/hledger-web/static/js/jquery.flot.selection.min.js
new file mode 100644
index 000000000..a0154fbc5
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.selection.min.js
@@ -0,0 +1,7 @@
+/* Javascript plotting library for jQuery, version 0.8.3.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/
+(function($){function init(plot){var selection={first:{x:-1,y:-1},second:{x:-1,y:-1},show:false,active:false};var savedhandlers={};var mouseUpHandler=null;function onMouseMove(e){if(selection.active){updateSelection(e);plot.getPlaceholder().trigger("plotselecting",[getSelection()])}}function onMouseDown(e){if(e.which!=1)return;document.body.focus();if(document.onselectstart!==undefined&&savedhandlers.onselectstart==null){savedhandlers.onselectstart=document.onselectstart;document.onselectstart=function(){return false}}if(document.ondrag!==undefined&&savedhandlers.ondrag==null){savedhandlers.ondrag=document.ondrag;document.ondrag=function(){return false}}setSelectionPos(selection.first,e);selection.active=true;mouseUpHandler=function(e){onMouseUp(e)};$(document).one("mouseup",mouseUpHandler)}function onMouseUp(e){mouseUpHandler=null;if(document.onselectstart!==undefined)document.onselectstart=savedhandlers.onselectstart;if(document.ondrag!==undefined)document.ondrag=savedhandlers.ondrag;selection.active=false;updateSelection(e);if(selectionIsSane())triggerSelectedEvent();else{plot.getPlaceholder().trigger("plotunselected",[]);plot.getPlaceholder().trigger("plotselecting",[null])}return false}function getSelection(){if(!selectionIsSane())return null;if(!selection.show)return null;var r={},c1=selection.first,c2=selection.second;$.each(plot.getAxes(),function(name,axis){if(axis.used){var p1=axis.c2p(c1[axis.direction]),p2=axis.c2p(c2[axis.direction]);r[name]={from:Math.min(p1,p2),to:Math.max(p1,p2)}}});return r}function triggerSelectedEvent(){var r=getSelection();plot.getPlaceholder().trigger("plotselected",[r]);if(r.xaxis&&r.yaxis)plot.getPlaceholder().trigger("selected",[{x1:r.xaxis.from,y1:r.yaxis.from,x2:r.xaxis.to,y2:r.yaxis.to}])}function clamp(min,value,max){return valuemax?max:value}function setSelectionPos(pos,e){var o=plot.getOptions();var offset=plot.getPlaceholder().offset();var plotOffset=plot.getPlotOffset();pos.x=clamp(0,e.pageX-offset.left-plotOffset.left,plot.width());pos.y=clamp(0,e.pageY-offset.top-plotOffset.top,plot.height());if(o.selection.mode=="y")pos.x=pos==selection.first?0:plot.width();if(o.selection.mode=="x")pos.y=pos==selection.first?0:plot.height()}function updateSelection(pos){if(pos.pageX==null)return;setSelectionPos(selection.second,pos);if(selectionIsSane()){selection.show=true;plot.triggerRedrawOverlay()}else clearSelection(true)}function clearSelection(preventEvent){if(selection.show){selection.show=false;plot.triggerRedrawOverlay();if(!preventEvent)plot.getPlaceholder().trigger("plotunselected",[])}}function extractRange(ranges,coord){var axis,from,to,key,axes=plot.getAxes();for(var k in axes){axis=axes[k];if(axis.direction==coord){key=coord+axis.n+"axis";if(!ranges[key]&&axis.n==1)key=coord+"axis";if(ranges[key]){from=ranges[key].from;to=ranges[key].to;break}}}if(!ranges[key]){axis=coord=="x"?plot.getXAxes()[0]:plot.getYAxes()[0];from=ranges[coord+"1"];to=ranges[coord+"2"]}if(from!=null&&to!=null&&from>to){var tmp=from;from=to;to=tmp}return{from:from,to:to,axis:axis}}function setSelection(ranges,preventEvent){var axis,range,o=plot.getOptions();if(o.selection.mode=="y"){selection.first.x=0;selection.second.x=plot.width()}else{range=extractRange(ranges,"x");selection.first.x=range.axis.p2c(range.from);selection.second.x=range.axis.p2c(range.to)}if(o.selection.mode=="x"){selection.first.y=0;selection.second.y=plot.height()}else{range=extractRange(ranges,"y");selection.first.y=range.axis.p2c(range.from);selection.second.y=range.axis.p2c(range.to)}selection.show=true;plot.triggerRedrawOverlay();if(!preventEvent&&selectionIsSane())triggerSelectedEvent()}function selectionIsSane(){var minSize=plot.getOptions().selection.minSize;return Math.abs(selection.second.x-selection.first.x)>=minSize&&Math.abs(selection.second.y-selection.first.y)>=minSize}plot.clearSelection=clearSelection;plot.setSelection=setSelection;plot.getSelection=getSelection;plot.hooks.bindEvents.push(function(plot,eventHolder){var o=plot.getOptions();if(o.selection.mode!=null){eventHolder.mousemove(onMouseMove);eventHolder.mousedown(onMouseDown)}});plot.hooks.drawOverlay.push(function(plot,ctx){if(selection.show&&selectionIsSane()){var plotOffset=plot.getPlotOffset();var o=plot.getOptions();ctx.save();ctx.translate(plotOffset.left,plotOffset.top);var c=$.color.parse(o.selection.color);ctx.strokeStyle=c.scale("a",.8).toString();ctx.lineWidth=1;ctx.lineJoin=o.selection.shape;ctx.fillStyle=c.scale("a",.4).toString();var x=Math.min(selection.first.x,selection.second.x)+.5,y=Math.min(selection.first.y,selection.second.y)+.5,w=Math.abs(selection.second.x-selection.first.x)-1,h=Math.abs(selection.second.y-selection.first.y)-1;ctx.fillRect(x,y,w,h);ctx.strokeRect(x,y,w,h);ctx.restore()}});plot.hooks.shutdown.push(function(plot,eventHolder){eventHolder.unbind("mousemove",onMouseMove);eventHolder.unbind("mousedown",onMouseDown);if(mouseUpHandler)$(document).unbind("mouseup",mouseUpHandler)})}$.plot.plugins.push({init:init,options:{selection:{mode:null,color:"#e8cfac",shape:"round",minSize:5}},name:"selection",version:"1.1"})})(jQuery);
\ No newline at end of file
diff --git a/hledger-web/static/js/jquery.flot.stack.js b/hledger-web/static/js/jquery.flot.stack.js
new file mode 100644
index 000000000..e75a7dfc0
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.stack.js
@@ -0,0 +1,188 @@
+/* Flot plugin for stacking data sets rather than overlyaing them.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+The plugin assumes the data is sorted on x (or y if stacking horizontally).
+For line charts, it is assumed that if a line has an undefined gap (from a
+null point), then the line above it should have the same gap - insert zeros
+instead of "null" if you want another behaviour. This also holds for the start
+and end of the chart. Note that stacking a mix of positive and negative values
+in most instances doesn't make sense (so it looks weird).
+
+Two or more series are stacked when their "stack" attribute is set to the same
+key (which can be any number or string or just "true"). To specify the default
+stack, you can set the stack option like this:
+
+	series: {
+		stack: null/false, true, or a key (number/string)
+	}
+
+You can also specify it for a single series, like this:
+
+	$.plot( $("#placeholder"), [{
+		data: [ ... ],
+		stack: true
+	}])
+
+The stacking order is determined by the order of the data series in the array
+(later series end up on top of the previous).
+
+Internally, the plugin modifies the datapoints in each series, adding an
+offset to the y value. For line series, extra data points are inserted through
+interpolation. If there's a second y value, it's also adjusted (e.g for bar
+charts or filled areas).
+
+*/
+
+(function ($) {
+    var options = {
+        series: { stack: null } // or number/string
+    };
+    
+    function init(plot) {
+        function findMatchingSeries(s, allseries) {
+            var res = null;
+            for (var i = 0; i < allseries.length; ++i) {
+                if (s == allseries[i])
+                    break;
+                
+                if (allseries[i].stack == s.stack)
+                    res = allseries[i];
+            }
+            
+            return res;
+        }
+        
+        function stackData(plot, s, datapoints) {
+            if (s.stack == null || s.stack === false)
+                return;
+
+            var other = findMatchingSeries(s, plot.getData());
+            if (!other)
+                return;
+
+            var ps = datapoints.pointsize,
+                points = datapoints.points,
+                otherps = other.datapoints.pointsize,
+                otherpoints = other.datapoints.points,
+                newpoints = [],
+                px, py, intery, qx, qy, bottom,
+                withlines = s.lines.show,
+                horizontal = s.bars.horizontal,
+                withbottom = ps > 2 && (horizontal ? datapoints.format[2].x : datapoints.format[2].y),
+                withsteps = withlines && s.lines.steps,
+                fromgap = true,
+                keyOffset = horizontal ? 1 : 0,
+                accumulateOffset = horizontal ? 0 : 1,
+                i = 0, j = 0, l, m;
+
+            while (true) {
+                if (i >= points.length)
+                    break;
+
+                l = newpoints.length;
+
+                if (points[i] == null) {
+                    // copy gaps
+                    for (m = 0; m < ps; ++m)
+                        newpoints.push(points[i + m]);
+                    i += ps;
+                }
+                else if (j >= otherpoints.length) {
+                    // for lines, we can't use the rest of the points
+                    if (!withlines) {
+                        for (m = 0; m < ps; ++m)
+                            newpoints.push(points[i + m]);
+                    }
+                    i += ps;
+                }
+                else if (otherpoints[j] == null) {
+                    // oops, got a gap
+                    for (m = 0; m < ps; ++m)
+                        newpoints.push(null);
+                    fromgap = true;
+                    j += otherps;
+                }
+                else {
+                    // cases where we actually got two points
+                    px = points[i + keyOffset];
+                    py = points[i + accumulateOffset];
+                    qx = otherpoints[j + keyOffset];
+                    qy = otherpoints[j + accumulateOffset];
+                    bottom = 0;
+
+                    if (px == qx) {
+                        for (m = 0; m < ps; ++m)
+                            newpoints.push(points[i + m]);
+
+                        newpoints[l + accumulateOffset] += qy;
+                        bottom = qy;
+                        
+                        i += ps;
+                        j += otherps;
+                    }
+                    else if (px > qx) {
+                        // we got past point below, might need to
+                        // insert interpolated extra point
+                        if (withlines && i > 0 && points[i - ps] != null) {
+                            intery = py + (points[i - ps + accumulateOffset] - py) * (qx - px) / (points[i - ps + keyOffset] - px);
+                            newpoints.push(qx);
+                            newpoints.push(intery + qy);
+                            for (m = 2; m < ps; ++m)
+                                newpoints.push(points[i + m]);
+                            bottom = qy; 
+                        }
+
+                        j += otherps;
+                    }
+                    else { // px < qx
+                        if (fromgap && withlines) {
+                            // if we come from a gap, we just skip this point
+                            i += ps;
+                            continue;
+                        }
+                            
+                        for (m = 0; m < ps; ++m)
+                            newpoints.push(points[i + m]);
+                        
+                        // we might be able to interpolate a point below,
+                        // this can give us a better y
+                        if (withlines && j > 0 && otherpoints[j - otherps] != null)
+                            bottom = qy + (otherpoints[j - otherps + accumulateOffset] - qy) * (px - qx) / (otherpoints[j - otherps + keyOffset] - qx);
+
+                        newpoints[l + accumulateOffset] += bottom;
+                        
+                        i += ps;
+                    }
+
+                    fromgap = false;
+                    
+                    if (l != newpoints.length && withbottom)
+                        newpoints[l + 2] += bottom;
+                }
+
+                // maintain the line steps invariant
+                if (withsteps && l != newpoints.length && l > 0
+                    && newpoints[l] != null
+                    && newpoints[l] != newpoints[l - ps]
+                    && newpoints[l + 1] != newpoints[l - ps + 1]) {
+                    for (m = 0; m < ps; ++m)
+                        newpoints[l + ps + m] = newpoints[l + m];
+                    newpoints[l + 1] = newpoints[l - ps + 1];
+                }
+            }
+
+            datapoints.points = newpoints;
+        }
+        
+        plot.hooks.processDatapoints.push(stackData);
+    }
+    
+    $.plot.plugins.push({
+        init: init,
+        options: options,
+        name: 'stack',
+        version: '1.2'
+    });
+})(jQuery);
diff --git a/hledger-web/static/js/jquery.flot.stack.min.js b/hledger-web/static/js/jquery.flot.stack.min.js
new file mode 100644
index 000000000..920764f5e
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.stack.min.js
@@ -0,0 +1,7 @@
+/* Javascript plotting library for jQuery, version 0.8.3.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/
+(function($){var options={series:{stack:null}};function init(plot){function findMatchingSeries(s,allseries){var res=null;for(var i=0;i2&&(horizontal?datapoints.format[2].x:datapoints.format[2].y),withsteps=withlines&&s.lines.steps,fromgap=true,keyOffset=horizontal?1:0,accumulateOffset=horizontal?0:1,i=0,j=0,l,m;while(true){if(i>=points.length)break;l=newpoints.length;if(points[i]==null){for(m=0;m=otherpoints.length){if(!withlines){for(m=0;mqx){if(withlines&&i>0&&points[i-ps]!=null){intery=py+(points[i-ps+accumulateOffset]-py)*(qx-px)/(points[i-ps+keyOffset]-px);newpoints.push(qx);newpoints.push(intery+qy);for(m=2;m0&&otherpoints[j-otherps]!=null)bottom=qy+(otherpoints[j-otherps+accumulateOffset]-qy)*(px-qx)/(otherpoints[j-otherps+keyOffset]-qx);newpoints[l+accumulateOffset]+=bottom;i+=ps}fromgap=false;if(l!=newpoints.length&&withbottom)newpoints[l+2]+=bottom}if(withsteps&&l!=newpoints.length&&l>0&&newpoints[l]!=null&&newpoints[l]!=newpoints[l-ps]&&newpoints[l+1]!=newpoints[l-ps+1]){for(m=0;m  s = r * sqrt(pi)/2
+                var size = radius * Math.sqrt(Math.PI) / 2;
+                ctx.rect(x - size, y - size, size + size, size + size);
+            },
+            diamond: function (ctx, x, y, radius, shadow) {
+                // pi * r^2 = 2s^2  =>  s = r * sqrt(pi/2)
+                var size = radius * Math.sqrt(Math.PI / 2);
+                ctx.moveTo(x - size, y);
+                ctx.lineTo(x, y - size);
+                ctx.lineTo(x + size, y);
+                ctx.lineTo(x, y + size);
+                ctx.lineTo(x - size, y);
+            },
+            triangle: function (ctx, x, y, radius, shadow) {
+                // pi * r^2 = 1/2 * s^2 * sin (pi / 3)  =>  s = r * sqrt(2 * pi / sin(pi / 3))
+                var size = radius * Math.sqrt(2 * Math.PI / Math.sin(Math.PI / 3));
+                var height = size * Math.sin(Math.PI / 3);
+                ctx.moveTo(x - size/2, y + height/2);
+                ctx.lineTo(x + size/2, y + height/2);
+                if (!shadow) {
+                    ctx.lineTo(x, y - height/2);
+                    ctx.lineTo(x - size/2, y + height/2);
+                }
+            },
+            cross: function (ctx, x, y, radius, shadow) {
+                // pi * r^2 = (2s)^2  =>  s = r * sqrt(pi)/2
+                var size = radius * Math.sqrt(Math.PI) / 2;
+                ctx.moveTo(x - size, y - size);
+                ctx.lineTo(x + size, y + size);
+                ctx.moveTo(x - size, y + size);
+                ctx.lineTo(x + size, y - size);
+            }
+        };
+
+        var s = series.points.symbol;
+        if (handlers[s])
+            series.points.symbol = handlers[s];
+    }
+    
+    function init(plot) {
+        plot.hooks.processDatapoints.push(processRawData);
+    }
+    
+    $.plot.plugins.push({
+        init: init,
+        name: 'symbols',
+        version: '1.0'
+    });
+})(jQuery);
diff --git a/hledger-web/static/js/jquery.flot.symbol.min.js b/hledger-web/static/js/jquery.flot.symbol.min.js
new file mode 100644
index 000000000..f4a343013
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.symbol.min.js
@@ -0,0 +1,7 @@
+/* Javascript plotting library for jQuery, version 0.8.3.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/
+(function($){function processRawData(plot,series,datapoints){var handlers={square:function(ctx,x,y,radius,shadow){var size=radius*Math.sqrt(Math.PI)/2;ctx.rect(x-size,y-size,size+size,size+size)},diamond:function(ctx,x,y,radius,shadow){var size=radius*Math.sqrt(Math.PI/2);ctx.moveTo(x-size,y);ctx.lineTo(x,y-size);ctx.lineTo(x+size,y);ctx.lineTo(x,y+size);ctx.lineTo(x-size,y)},triangle:function(ctx,x,y,radius,shadow){var size=radius*Math.sqrt(2*Math.PI/Math.sin(Math.PI/3));var height=size*Math.sin(Math.PI/3);ctx.moveTo(x-size/2,y+height/2);ctx.lineTo(x+size/2,y+height/2);if(!shadow){ctx.lineTo(x,y-height/2);ctx.lineTo(x-size/2,y+height/2)}},cross:function(ctx,x,y,radius,shadow){var size=radius*Math.sqrt(Math.PI)/2;ctx.moveTo(x-size,y-size);ctx.lineTo(x+size,y+size);ctx.moveTo(x-size,y+size);ctx.lineTo(x+size,y-size)}};var s=series.points.symbol;if(handlers[s])series.points.symbol=handlers[s]}function init(plot){plot.hooks.processDatapoints.push(processRawData)}$.plot.plugins.push({init:init,name:"symbols",version:"1.0"})})(jQuery);
\ No newline at end of file
diff --git a/hledger-web/static/js/jquery.flot.threshold.js b/hledger-web/static/js/jquery.flot.threshold.js
new file mode 100644
index 000000000..8c99c401d
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.threshold.js
@@ -0,0 +1,142 @@
+/* Flot plugin for thresholding data.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+The plugin supports these options:
+
+	series: {
+		threshold: {
+			below: number
+			color: colorspec
+		}
+	}
+
+It can also be applied to a single series, like this:
+
+	$.plot( $("#placeholder"), [{
+		data: [ ... ],
+		threshold: { ... }
+	}])
+
+An array can be passed for multiple thresholding, like this:
+
+	threshold: [{
+		below: number1
+		color: color1
+	},{
+		below: number2
+		color: color2
+	}]
+
+These multiple threshold objects can be passed in any order since they are
+sorted by the processing function.
+
+The data points below "below" are drawn with the specified color. This makes
+it easy to mark points below 0, e.g. for budget data.
+
+Internally, the plugin works by splitting the data into two series, above and
+below the threshold. The extra series below the threshold will have its label
+cleared and the special "originSeries" attribute set to the original series.
+You may need to check for this in hover events.
+
+*/
+
+(function ($) {
+    var options = {
+        series: { threshold: null } // or { below: number, color: color spec}
+    };
+    
+    function init(plot) {
+        function thresholdData(plot, s, datapoints, below, color) {
+            var ps = datapoints.pointsize, i, x, y, p, prevp,
+                thresholded = $.extend({}, s); // note: shallow copy
+
+            thresholded.datapoints = { points: [], pointsize: ps, format: datapoints.format };
+            thresholded.label = null;
+            thresholded.color = color;
+            thresholded.threshold = null;
+            thresholded.originSeries = s;
+            thresholded.data = [];
+ 
+            var origpoints = datapoints.points,
+                addCrossingPoints = s.lines.show;
+
+            var threspoints = [];
+            var newpoints = [];
+            var m;
+
+            for (i = 0; i < origpoints.length; i += ps) {
+                x = origpoints[i];
+                y = origpoints[i + 1];
+
+                prevp = p;
+                if (y < below)
+                    p = threspoints;
+                else
+                    p = newpoints;
+
+                if (addCrossingPoints && prevp != p && x != null
+                    && i > 0 && origpoints[i - ps] != null) {
+                    var interx = x + (below - y) * (x - origpoints[i - ps]) / (y - origpoints[i - ps + 1]);
+                    prevp.push(interx);
+                    prevp.push(below);
+                    for (m = 2; m < ps; ++m)
+                        prevp.push(origpoints[i + m]);
+                    
+                    p.push(null); // start new segment
+                    p.push(null);
+                    for (m = 2; m < ps; ++m)
+                        p.push(origpoints[i + m]);
+                    p.push(interx);
+                    p.push(below);
+                    for (m = 2; m < ps; ++m)
+                        p.push(origpoints[i + m]);
+                }
+
+                p.push(x);
+                p.push(y);
+                for (m = 2; m < ps; ++m)
+                    p.push(origpoints[i + m]);
+            }
+
+            datapoints.points = newpoints;
+            thresholded.datapoints.points = threspoints;
+            
+            if (thresholded.datapoints.points.length > 0) {
+                var origIndex = $.inArray(s, plot.getData());
+                // Insert newly-generated series right after original one (to prevent it from becoming top-most)
+                plot.getData().splice(origIndex + 1, 0, thresholded);
+            }
+                
+            // FIXME: there are probably some edge cases left in bars
+        }
+        
+        function processThresholds(plot, s, datapoints) {
+            if (!s.threshold)
+                return;
+            
+            if (s.threshold instanceof Array) {
+                s.threshold.sort(function(a, b) {
+                    return a.below - b.below;
+                });
+                
+                $(s.threshold).each(function(i, th) {
+                    thresholdData(plot, s, datapoints, th.below, th.color);
+                });
+            }
+            else {
+                thresholdData(plot, s, datapoints, s.threshold.below, s.threshold.color);
+            }
+        }
+        
+        plot.hooks.processDatapoints.push(processThresholds);
+    }
+    
+    $.plot.plugins.push({
+        init: init,
+        options: options,
+        name: 'threshold',
+        version: '1.2'
+    });
+})(jQuery);
diff --git a/hledger-web/static/js/jquery.flot.threshold.min.js b/hledger-web/static/js/jquery.flot.threshold.min.js
new file mode 100644
index 000000000..ce93e0f48
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.threshold.min.js
@@ -0,0 +1,7 @@
+/* Javascript plotting library for jQuery, version 0.8.3.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/
+(function($){var options={series:{threshold:null}};function init(plot){function thresholdData(plot,s,datapoints,below,color){var ps=datapoints.pointsize,i,x,y,p,prevp,thresholded=$.extend({},s);thresholded.datapoints={points:[],pointsize:ps,format:datapoints.format};thresholded.label=null;thresholded.color=color;thresholded.threshold=null;thresholded.originSeries=s;thresholded.data=[];var origpoints=datapoints.points,addCrossingPoints=s.lines.show;var threspoints=[];var newpoints=[];var m;for(i=0;i0&&origpoints[i-ps]!=null){var interx=x+(below-y)*(x-origpoints[i-ps])/(y-origpoints[i-ps+1]);prevp.push(interx);prevp.push(below);for(m=2;m0){var origIndex=$.inArray(s,plot.getData());plot.getData().splice(origIndex+1,0,thresholded)}}function processThresholds(plot,s,datapoints){if(!s.threshold)return;if(s.threshold instanceof Array){s.threshold.sort(function(a,b){return a.below-b.below});$(s.threshold).each(function(i,th){thresholdData(plot,s,datapoints,th.below,th.color)})}else{thresholdData(plot,s,datapoints,s.threshold.below,s.threshold.color)}}plot.hooks.processDatapoints.push(processThresholds)}$.plot.plugins.push({init:init,options:options,name:"threshold",version:"1.2"})})(jQuery);
\ No newline at end of file
diff --git a/hledger-web/static/js/jquery.flot.tooltip.js b/hledger-web/static/js/jquery.flot.tooltip.js
new file mode 100644
index 000000000..c71274268
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.tooltip.js
@@ -0,0 +1,409 @@
+/*
+ * jquery.flot.tooltip
+ * 
+ * description: easy-to-use tooltips for Flot charts
+ * version: 0.7.1
+ * author: Krzysztof Urbas @krzysu [myviews.pl]
+ * website: https://github.com/krzysu/flot.tooltip
+ * 
+ * build on 2014-06-22
+ * released under MIT License, 2012
+*/ 
+// IE8 polyfill for Array.indexOf
+if (!Array.prototype.indexOf) {
+    Array.prototype.indexOf = function (searchElement, fromIndex) {
+        if ( this === undefined || this === null ) {
+            throw new TypeError( '"this" is null or not defined' );
+        }
+        var length = this.length >>> 0; // Hack to convert object.length to a UInt32
+        fromIndex = +fromIndex || 0;
+        if (Math.abs(fromIndex) === Infinity) {
+            fromIndex = 0;
+        }
+        if (fromIndex < 0) {
+            fromIndex += length;
+            if (fromIndex < 0) {
+                fromIndex = 0;
+            }
+        }
+
+        for (;fromIndex < length; fromIndex++) {
+            if (this[fromIndex] === searchElement) {
+                return fromIndex;
+            }
+        }
+
+        return -1;
+    };
+}
+
+(function ($) {
+
+    // plugin options, default values
+    var defaultOptions = {
+        tooltip: false,
+        tooltipOpts: {
+            content: "%s | X: %x | Y: %y",
+            // allowed templates are:
+            // %s -> series label,
+            // %lx -> x axis label (requires flot-axislabels plugin https://github.com/markrcote/flot-axislabels),
+            // %ly -> y axis label (requires flot-axislabels plugin https://github.com/markrcote/flot-axislabels),
+            // %x -> X value,
+            // %y -> Y value,
+            // %x.2 -> precision of X value,
+            // %p -> percent
+            xDateFormat: null,
+            yDateFormat: null,
+            monthNames: null,
+            dayNames: null,
+            shifts: {
+                x: 10,
+                y: 20
+            },
+            defaultTheme: true,
+
+            // callbacks
+            onHover: function(flotItem, $tooltipEl) {}
+        }
+    };
+
+    // object
+    var FlotTooltip = function(plot) {
+
+        // variables
+        this.tipPosition = {x: 0, y: 0};
+
+        this.init(plot);
+    };
+
+    // main plugin function
+    FlotTooltip.prototype.init = function(plot) {
+
+        var that = this;
+
+        // detect other flot plugins
+        var plotPluginsLength = $.plot.plugins.length;
+        this.plotPlugins = [];
+
+        if (plotPluginsLength) {
+            for (var p = 0; p < plotPluginsLength; p++) {
+                this.plotPlugins.push($.plot.plugins[p].name);
+            }
+        }
+
+        plot.hooks.bindEvents.push(function (plot, eventHolder) {
+
+            // get plot options
+            that.plotOptions = plot.getOptions();
+
+            // if not enabled return
+            if (that.plotOptions.tooltip === false || typeof that.plotOptions.tooltip === 'undefined') return;
+
+            // shortcut to access tooltip options
+            that.tooltipOptions = that.plotOptions.tooltipOpts;
+
+            // create tooltip DOM element
+            var $tip = that.getDomElement();
+
+            // bind event
+            $( plot.getPlaceholder() ).bind("plothover", plothover);
+
+            $(eventHolder).bind('mousemove', mouseMove);
+        });
+
+        plot.hooks.shutdown.push(function (plot, eventHolder){
+            $(plot.getPlaceholder()).unbind("plothover", plothover);
+            $(eventHolder).unbind("mousemove", mouseMove);
+        });
+
+        function mouseMove(e){
+            var pos = {};
+            pos.x = e.pageX;
+            pos.y = e.pageY;
+            that.updateTooltipPosition(pos);
+        }
+
+        function plothover(event, pos, item) {
+            var $tip = that.getDomElement();
+            if (item) {
+                var tipText;
+
+                // convert tooltip content template to real tipText
+                tipText = that.stringFormat(that.tooltipOptions.content, item);
+
+                $tip.html( tipText );
+                that.updateTooltipPosition({ x: pos.pageX, y: pos.pageY });
+                $tip.css({
+                        left: that.tipPosition.x + that.tooltipOptions.shifts.x,
+                        top: that.tipPosition.y + that.tooltipOptions.shifts.y
+                    })
+                    .show();
+
+                // run callback
+                if(typeof that.tooltipOptions.onHover === 'function') {
+                    that.tooltipOptions.onHover(item, $tip);
+                }
+            }
+            else {
+                $tip.hide().html('');
+            }
+        }
+    };
+
+    /**
+     * get or create tooltip DOM element
+     * @return jQuery object
+     */
+    FlotTooltip.prototype.getDomElement = function() {
+        var $tip = $('#flotTip');
+
+        if( $tip.length === 0 ){
+            $tip = $('').attr('id', 'flotTip');
+            $tip.appendTo('body').hide().css({position: 'absolute'});
+
+            if(this.tooltipOptions.defaultTheme) {
+                $tip.css({
+                    'background': '#fff',
+                    'z-index': '1040',
+                    'padding': '0.4em 0.6em',
+                    'border-radius': '0.5em',
+                    'font-size': '0.8em',
+                    'border': '1px solid #111',
+                    'display': 'none',
+                    'white-space': 'nowrap'
+                });
+            }
+        }
+
+        return $tip;
+    };
+
+    // as the name says
+    FlotTooltip.prototype.updateTooltipPosition = function(pos) {
+        var $tip = $('#flotTip');
+
+        var totalTipWidth = $tip.outerWidth() + this.tooltipOptions.shifts.x;
+        var totalTipHeight = $tip.outerHeight() + this.tooltipOptions.shifts.y;
+        if ((pos.x - $(window).scrollLeft()) > ($(window).innerWidth() - totalTipWidth)) {
+            pos.x -= totalTipWidth;
+        }
+        if ((pos.y - $(window).scrollTop()) > ($(window).innerHeight() - totalTipHeight)) {
+            pos.y -= totalTipHeight;
+        }
+        this.tipPosition.x = pos.x;
+        this.tipPosition.y = pos.y;
+    };
+
+    /**
+     * core function, create tooltip content
+     * @param  {string} content - template with tooltip content
+     * @param  {object} item - Flot item
+     * @return {string} real tooltip content for current item
+     */
+    FlotTooltip.prototype.stringFormat = function(content, item) {
+
+        var percentPattern = /%p\.{0,1}(\d{0,})/;
+        var seriesPattern = /%s/;
+        var xLabelPattern = /%lx/; // requires flot-axislabels plugin https://github.com/markrcote/flot-axislabels, will be ignored if plugin isn't loaded
+        var yLabelPattern = /%ly/; // requires flot-axislabels plugin https://github.com/markrcote/flot-axislabels, will be ignored if plugin isn't loaded
+        var xPattern = /%x\.{0,1}(\d{0,})/;
+        var yPattern = /%y\.{0,1}(\d{0,})/;
+        var xPatternWithoutPrecision = "%x";
+        var yPatternWithoutPrecision = "%y";
+        var customTextPattern = "%ct";
+
+        var x, y, customText;
+
+        // for threshold plugin we need to read data from different place
+        if (typeof item.series.threshold !== "undefined") {
+            x = item.datapoint[0];
+            y = item.datapoint[1];
+            customText = item.datapoint[2];
+        } else if (typeof item.series.lines !== "undefined" && item.series.lines.steps) {
+            x = item.series.datapoints.points[item.dataIndex * 2];
+            y = item.series.datapoints.points[item.dataIndex * 2 + 1];
+            // TODO: where to find custom text in this variant?
+            customText = "";
+        } else {
+            x = item.series.data[item.dataIndex][0];
+            y = item.series.data[item.dataIndex][1];
+            customText = item.series.data[item.dataIndex][2];
+        }
+
+        // I think this is only in case of threshold plugin
+        if (item.series.label === null && item.series.originSeries) {
+            item.series.label = item.series.originSeries.label;
+        }
+
+        // if it is a function callback get the content string
+        if( typeof(content) === 'function' ) {
+            content = content(item.series.label, x, y, item);
+        }
+
+        // percent match for pie charts
+        if( typeof (item.series.percent) !== 'undefined' ) {
+            content = this.adjustValPrecision(percentPattern, content, item.series.percent);
+        }
+
+        // series match
+        if( typeof(item.series.label) !== 'undefined' ) {
+            content = content.replace(seriesPattern, item.series.label);
+        }
+        else {
+            //remove %s if label is undefined
+            content = content.replace(seriesPattern, "");
+        }
+
+        // x axis label match
+        if( this.hasAxisLabel('xaxis', item) ) {
+            content = content.replace(xLabelPattern, item.series.xaxis.options.axisLabel);
+        }
+        else {
+            //remove %lx if axis label is undefined or axislabels plugin not present
+            content = content.replace(xLabelPattern, "");
+        }
+
+        // y axis label match
+        if( this.hasAxisLabel('yaxis', item) ) {
+            content = content.replace(yLabelPattern, item.series.yaxis.options.axisLabel);
+        }
+        else {
+            //remove %ly if axis label is undefined or axislabels plugin not present
+            content = content.replace(yLabelPattern, "");
+        }
+
+        // time mode axes with custom dateFormat
+        if(this.isTimeMode('xaxis', item) && this.isXDateFormat(item)) {
+            content = content.replace(xPattern, this.timestampToDate(x, this.tooltipOptions.xDateFormat, item.series.xaxis.options));
+        }
+
+        if(this.isTimeMode('yaxis', item) && this.isYDateFormat(item)) {
+            content = content.replace(yPattern, this.timestampToDate(y, this.tooltipOptions.yDateFormat, item.series.yaxis.options));
+        }
+
+        // set precision if defined
+        if(typeof x === 'number') {
+            content = this.adjustValPrecision(xPattern, content, x);
+        }
+        if(typeof y === 'number') {
+            content = this.adjustValPrecision(yPattern, content, y);
+        }
+
+        // change x from number to given label, if given
+        if(typeof item.series.xaxis.ticks !== 'undefined') {
+
+            var ticks;
+            if(this.hasRotatedXAxisTicks(item)) {
+                // xaxis.ticks will be an empty array if tickRotor is being used, but the values are available in rotatedTicks
+                ticks = 'rotatedTicks';
+            }
+            else {
+                ticks = 'ticks';
+            }
+
+            // see https://github.com/krzysu/flot.tooltip/issues/65
+            var tickIndex = item.dataIndex + item.seriesIndex;
+
+            if(item.series.xaxis[ticks].length > tickIndex && !this.isTimeMode('xaxis', item)) {
+                var valueX = (this.isCategoriesMode('xaxis', item)) ? item.series.xaxis[ticks][tickIndex].label : item.series.xaxis[ticks][tickIndex].v;
+                if (valueX === x) {
+                    content = content.replace(xPattern, item.series.xaxis[ticks][tickIndex].label);
+                }
+            }
+        }
+
+        // change y from number to given label, if given
+        if(typeof item.series.yaxis.ticks !== 'undefined') {
+            for (var index in item.series.yaxis.ticks) {
+                if (item.series.yaxis.ticks.hasOwnProperty(index)) {
+                    var valueY = (this.isCategoriesMode('yaxis', item)) ? item.series.yaxis.ticks[index].label : item.series.yaxis.ticks[index].v;
+                    if (valueY === y) {
+                        content = content.replace(yPattern, item.series.yaxis.ticks[index].label);
+                    }
+                }
+            }
+        }
+
+        // if no value customization, use tickFormatter by default
+        if(typeof item.series.xaxis.tickFormatter !== 'undefined') {
+            //escape dollar
+            content = content.replace(xPatternWithoutPrecision, item.series.xaxis.tickFormatter(x, item.series.xaxis).replace(/\$/g, '$$'));
+        }
+        if(typeof item.series.yaxis.tickFormatter !== 'undefined') {
+            //escape dollar
+            content = content.replace(yPatternWithoutPrecision, item.series.yaxis.tickFormatter(y, item.series.yaxis).replace(/\$/g, '$$'));
+        }
+
+        if(customText) {
+            content = content.replace(customTextPattern, customText);
+        }
+
+        return content;
+    };
+
+    // helpers just for readability
+    FlotTooltip.prototype.isTimeMode = function(axisName, item) {
+        return (typeof item.series[axisName].options.mode !== 'undefined' && item.series[axisName].options.mode === 'time');
+    };
+
+    FlotTooltip.prototype.isXDateFormat = function(item) {
+        return (typeof this.tooltipOptions.xDateFormat !== 'undefined' && this.tooltipOptions.xDateFormat !== null);
+    };
+
+    FlotTooltip.prototype.isYDateFormat = function(item) {
+        return (typeof this.tooltipOptions.yDateFormat !== 'undefined' && this.tooltipOptions.yDateFormat !== null);
+    };
+
+    FlotTooltip.prototype.isCategoriesMode = function(axisName, item) {
+        return (typeof item.series[axisName].options.mode !== 'undefined' && item.series[axisName].options.mode === 'categories');
+    };
+
+    //
+    FlotTooltip.prototype.timestampToDate = function(tmst, dateFormat, options) {
+        var theDate = $.plot.dateGenerator(tmst, options);
+        return $.plot.formatDate(theDate, dateFormat, this.tooltipOptions.monthNames, this.tooltipOptions.dayNames);
+    };
+
+    //
+    FlotTooltip.prototype.adjustValPrecision = function(pattern, content, value) {
+
+        var precision;
+        var matchResult = content.match(pattern);
+        if( matchResult !== null ) {
+            if(RegExp.$1 !== '') {
+                precision = RegExp.$1;
+                value = value.toFixed(precision);
+
+                // only replace content if precision exists, in other case use thickformater
+                content = content.replace(pattern, value);
+            }
+        }
+        return content;
+    };
+
+    // other plugins detection below
+
+    // check if flot-axislabels plugin (https://github.com/markrcote/flot-axislabels) is used and that an axis label is given
+    FlotTooltip.prototype.hasAxisLabel = function(axisName, item) {
+        return (this.plotPlugins.indexOf('axisLabels') !== -1 && typeof item.series[axisName].options.axisLabel !== 'undefined' && item.series[axisName].options.axisLabel.length > 0);
+    };
+
+    // check whether flot-tickRotor, a plugin which allows rotation of X-axis ticks, is being used
+    FlotTooltip.prototype.hasRotatedXAxisTicks = function(item) {
+        return ($.grep($.plot.plugins, function(p){ return p.name === "tickRotor"; }).length === 1 && typeof item.series.xaxis.rotatedTicks !== 'undefined');
+    };
+
+    //
+    var init = function(plot) {
+      new FlotTooltip(plot);
+    };
+
+    // define Flot plugin
+    $.plot.plugins.push({
+        init: init,
+        options: defaultOptions,
+        name: 'tooltip',
+        version: '0.6.7'
+    });
+
+})(jQuery);
diff --git a/hledger-web/static/js/jquery.flot.tooltip.min.js b/hledger-web/static/js/jquery.flot.tooltip.min.js
new file mode 100644
index 000000000..0626fbfbd
--- /dev/null
+++ b/hledger-web/static/js/jquery.flot.tooltip.min.js
@@ -0,0 +1,12 @@
+/*
+ * jquery.flot.tooltip
+ * 
+ * description: easy-to-use tooltips for Flot charts
+ * version: 0.7.1
+ * author: Krzysztof Urbas @krzysu [myviews.pl]
+ * website: https://github.com/krzysu/flot.tooltip
+ * 
+ * build on 2014-06-22
+ * released under MIT License, 2012
+*/ 
+Array.prototype.indexOf||(Array.prototype.indexOf=function(t,i){if(void 0===this||null===this)throw new TypeError('"this" is null or not defined');var e=this.length>>>0;for(i=+i||0,1/0===Math.abs(i)&&(i=0),0>i&&(i+=e,0>i&&(i=0));e>i;i++)if(this[i]===t)return i;return-1}),function(t){var i={tooltip:!1,tooltipOpts:{content:"%s | X: %x | Y: %y",xDateFormat:null,yDateFormat:null,monthNames:null,dayNames:null,shifts:{x:10,y:20},defaultTheme:!0,onHover:function(){}}},e=function(t){this.tipPosition={x:0,y:0},this.init(t)};e.prototype.init=function(i){function e(t){var i={};i.x=t.pageX,i.y=t.pageY,o.updateTooltipPosition(i)}function s(t,i,e){var s=o.getDomElement();if(e){var a;a=o.stringFormat(o.tooltipOptions.content,e),s.html(a),o.updateTooltipPosition({x:i.pageX,y:i.pageY}),s.css({left:o.tipPosition.x+o.tooltipOptions.shifts.x,top:o.tipPosition.y+o.tooltipOptions.shifts.y}).show(),"function"==typeof o.tooltipOptions.onHover&&o.tooltipOptions.onHover(e,s)}else s.hide().html("")}var o=this,a=t.plot.plugins.length;if(this.plotPlugins=[],a)for(var n=0;a>n;n++)this.plotPlugins.push(t.plot.plugins[n].name);i.hooks.bindEvents.push(function(i,a){o.plotOptions=i.getOptions(),o.plotOptions.tooltip!==!1&&void 0!==o.plotOptions.tooltip&&(o.tooltipOptions=o.plotOptions.tooltipOpts,o.getDomElement(),t(i.getPlaceholder()).bind("plothover",s),t(a).bind("mousemove",e))}),i.hooks.shutdown.push(function(i,o){t(i.getPlaceholder()).unbind("plothover",s),t(o).unbind("mousemove",e)})},e.prototype.getDomElement=function(){var i=t("#flotTip");return 0===i.length&&(i=t("").attr("id","flotTip"),i.appendTo("body").hide().css({position:"absolute"}),this.tooltipOptions.defaultTheme&&i.css({background:"#fff","z-index":"1040",padding:"0.4em 0.6em","border-radius":"0.5em","font-size":"0.8em",border:"1px solid #111",display:"none","white-space":"nowrap"})),i},e.prototype.updateTooltipPosition=function(i){var e=t("#flotTip"),s=e.outerWidth()+this.tooltipOptions.shifts.x,o=e.outerHeight()+this.tooltipOptions.shifts.y;i.x-t(window).scrollLeft()>t(window).innerWidth()-s&&(i.x-=s),i.y-t(window).scrollTop()>t(window).innerHeight()-o&&(i.y-=o),this.tipPosition.x=i.x,this.tipPosition.y=i.y},e.prototype.stringFormat=function(t,i){var e,s,o,a=/%p\.{0,1}(\d{0,})/,n=/%s/,r=/%lx/,p=/%ly/,l=/%x\.{0,1}(\d{0,})/,d=/%y\.{0,1}(\d{0,})/,x="%x",h="%y",u="%ct";if(i.series.threshold!==void 0?(e=i.datapoint[0],s=i.datapoint[1],o=i.datapoint[2]):i.series.lines!==void 0&&i.series.lines.steps?(e=i.series.datapoints.points[2*i.dataIndex],s=i.series.datapoints.points[2*i.dataIndex+1],o=""):(e=i.series.data[i.dataIndex][0],s=i.series.data[i.dataIndex][1],o=i.series.data[i.dataIndex][2]),null===i.series.label&&i.series.originSeries&&(i.series.label=i.series.originSeries.label),"function"==typeof t&&(t=t(i.series.label,e,s,i)),i.series.percent!==void 0&&(t=this.adjustValPrecision(a,t,i.series.percent)),t=i.series.label!==void 0?t.replace(n,i.series.label):t.replace(n,""),t=this.hasAxisLabel("xaxis",i)?t.replace(r,i.series.xaxis.options.axisLabel):t.replace(r,""),t=this.hasAxisLabel("yaxis",i)?t.replace(p,i.series.yaxis.options.axisLabel):t.replace(p,""),this.isTimeMode("xaxis",i)&&this.isXDateFormat(i)&&(t=t.replace(l,this.timestampToDate(e,this.tooltipOptions.xDateFormat,i.series.xaxis.options))),this.isTimeMode("yaxis",i)&&this.isYDateFormat(i)&&(t=t.replace(d,this.timestampToDate(s,this.tooltipOptions.yDateFormat,i.series.yaxis.options))),"number"==typeof e&&(t=this.adjustValPrecision(l,t,e)),"number"==typeof s&&(t=this.adjustValPrecision(d,t,s)),i.series.xaxis.ticks!==void 0){var c;c=this.hasRotatedXAxisTicks(i)?"rotatedTicks":"ticks";var m=i.dataIndex+i.seriesIndex;if(i.series.xaxis[c].length>m&&!this.isTimeMode("xaxis",i)){var f=this.isCategoriesMode("xaxis",i)?i.series.xaxis[c][m].label:i.series.xaxis[c][m].v;f===e&&(t=t.replace(l,i.series.xaxis[c][m].label))}}if(i.series.yaxis.ticks!==void 0)for(var y in i.series.yaxis.ticks)if(i.series.yaxis.ticks.hasOwnProperty(y)){var v=this.isCategoriesMode("yaxis",i)?i.series.yaxis.ticks[y].label:i.series.yaxis.ticks[y].v;v===s&&(t=t.replace(d,i.series.yaxis.ticks[y].label))}return i.series.xaxis.tickFormatter!==void 0&&(t=t.replace(x,i.series.xaxis.tickFormatter(e,i.series.xaxis).replace(/\$/g,"$$"))),i.series.yaxis.tickFormatter!==void 0&&(t=t.replace(h,i.series.yaxis.tickFormatter(s,i.series.yaxis).replace(/\$/g,"$$"))),o&&(t=t.replace(u,o)),t},e.prototype.isTimeMode=function(t,i){return i.series[t].options.mode!==void 0&&"time"===i.series[t].options.mode},e.prototype.isXDateFormat=function(){return this.tooltipOptions.xDateFormat!==void 0&&null!==this.tooltipOptions.xDateFormat},e.prototype.isYDateFormat=function(){return this.tooltipOptions.yDateFormat!==void 0&&null!==this.tooltipOptions.yDateFormat},e.prototype.isCategoriesMode=function(t,i){return i.series[t].options.mode!==void 0&&"categories"===i.series[t].options.mode},e.prototype.timestampToDate=function(i,e,s){var o=t.plot.dateGenerator(i,s);return t.plot.formatDate(o,e,this.tooltipOptions.monthNames,this.tooltipOptions.dayNames)},e.prototype.adjustValPrecision=function(t,i,e){var s,o=i.match(t);return null!==o&&""!==RegExp.$1&&(s=RegExp.$1,e=e.toFixed(s),i=i.replace(t,e)),i},e.prototype.hasAxisLabel=function(t,i){return-1!==this.plotPlugins.indexOf("axisLabels")&&i.series[t].options.axisLabel!==void 0&&i.series[t].options.axisLabel.length>0},e.prototype.hasRotatedXAxisTicks=function(i){return 1===t.grep(t.plot.plugins,function(t){return"tickRotor"===t.name}).length&&i.series.xaxis.rotatedTicks!==void 0};var s=function(t){new e(t)};t.plot.plugins.push({init:s,options:i,name:"tooltip",version:"0.6.7"})}(jQuery);
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