A grouped bar chart

This is a grouped Bar chart.

[No canvas support]
hmargin.grouped setting:

This goes in the documents header:
<script src="RGraph.common.core.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]
</canvas>
This is the code that generates the chart:
<script>
    window.onload = function ()
    {
        // A global on purpose
        bar = new RGraph.Bar({
            id: 'cvs',
            data: [[1250,1450,750,450],[1300,1375,750,525],[1500,1480,650,600],[1450,1500,700,450]],
            options: {
                labels: ['Jan 2008\r\nStart year','Jan 2009\r\nBest year','Jan 2010\r\nLast year','Jan 2011\r\nThis year!'],
                colors: ['#C7CFC7','#B2C8B2','#D9E0DE','#CDDED1'],
                hmargin: 15,
                hmarginGrouped: 3,
                gutterLeft: 45,
                gutterBottom: 45,
                backgroundGridVlines: false,
                backgroundGridBorder: false,
                textSize: 12,
                strokestyle: 'rgba(0,0,0,0)',
                shadow: false,
                textAccessible: true
            }
        }).draw();
    };
</script>