A Line chart which highlights based on the mouse X coordinate

[No canvas support]

This goes in the documents header:
<script src="RGraph.common.core.js"></script>
<script src="RGraph.common.dynamic.js"></script>
<script src="RGraph.common.tooltips.js"></script>
<script src="RGraph.bar.js"></script>
Put this where you want the chart to show up:
<canvas id="cvs" width="600" height="250">
    [No canvas support]
This is the code that generates the chart:
    new RGraph.Line({
        id: 'cvs',
        data: [4,5,5,8,8,7,8,9,8,11,13,13,12,14,15,15,17,18,18,17,17],
        options: {
            tooltips: function () {return "\0";},
            tooltipsHotspotXonly: true,
            xaxisTickmarksCount: 6,
            marginLeft: 30,
            marginRight: 30,
            xaxisLabels: ['Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday']