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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+ <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+    <title>Flot Examples</title>
+    <link href="layout.css" rel="stylesheet" type="text/css">
+    <!--[if lte IE 8]><script language="javascript" type="text/javascript" src="../excanvas.min.js"></script><![endif]-->
+    <script language="javascript" type="text/javascript" src="../jquery.js"></script>
+    <script language="javascript" type="text/javascript" src="../jquery.flot.js"></script>
+    <script language="javascript" type="text/javascript" src="../jquery.flot.crosshair.js"></script>
+ </head>
+    <body>
+    <h1>Flot Examples</h1>
+
+    <div id="placeholder" style="width:600px;height:300px"></div>
+
+    <p>You can add crosshairs that'll track the mouse position, either
+    on both axes or as here on only one.</p>
+
+    <p>If you combine it with listening on hover events, you can use
+    it to track the intersection on the curves by interpolating
+    the data points (look at the legend).</p>
+
+    <p id="hoverdata"></p>
+
+<script type="text/javascript">
+var plot;
+$(function () {
+    var sin = [], cos = [];
+    for (var i = 0; i < 14; i += 0.1) {
+        sin.push([i, Math.sin(i)]);
+        cos.push([i, Math.cos(i)]);
+    }
+
+    plot = $.plot($("#placeholder"),
+                      [ { data: sin, label: "sin(x) = -0.00"},
+                        { data: cos, label: "cos(x) = -0.00" } ], {
+                            series: {
+                                lines: { show: true }
+                            },
+                            crosshair: { mode: "x" },
+                            grid: { hoverable: true, autoHighlight: false },
+                            yaxis: { min: -1.2, max: 1.2 }
+                        });
+    var legends = $("#placeholder .legendLabel");
+    legends.each(function () {
+        // fix the widths so they don't jump around
+        $(this).css('width', $(this).width());
+    });
+
+    var updateLegendTimeout = null;
+    var latestPosition = null;
+    
+    function updateLegend() {
+        updateLegendTimeout = null;
+        
+        var pos = latestPosition;
+        
+        var axes = plot.getAxes();
+        if (pos.x < axes.xaxis.min || pos.x > axes.xaxis.max ||
+            pos.y < axes.yaxis.min || pos.y > axes.yaxis.max)
+            return;
+
+        var i, j, dataset = plot.getData();
+        for (i = 0; i < dataset.length; ++i) {
+            var series = dataset[i];
+
+            // find the nearest points, x-wise
+            for (j = 0; j < series.data.length; ++j)
+                if (series.data[j][0] > pos.x)
+                    break;
+            
+            // now interpolate
+            var y, p1 = series.data[j - 1], p2 = series.data[j];
+            if (p1 == null)
+                y = p2[1];
+            else if (p2 == null)
+                y = p1[1];
+            else
+                y = p1[1] + (p2[1] - p1[1]) * (pos.x - p1[0]) / (p2[0] - p1[0]);
+
+            legends.eq(i).text(series.label.replace(/=.*/, "= " + y.toFixed(2)));
+        }
+    }
+    
+    $("#placeholder").bind("plothover",  function (event, pos, item) {
+        latestPosition = pos;
+        if (!updateLegendTimeout)
+            updateLegendTimeout = setTimeout(updateLegend, 50);
+    });
+});
+</script>
+
+ </body>
+</html>