A nested Donut/Pie chart

This goes in the documents header:

<script src="RGraph.common.core.js"></script>
<script src="RGraph.common.key.js"></script>
<script src="RGraph.pie.js"></script>

Put this where you want the chart to show up:

<canvas id="cvs" width="475" height="350" >
    [No canvas support]
</canvas>

This is the code that generates the chart:

<script>
    window.onload = function ()
    {
        var pie = new RGraph.Pie({
            id: 'cvs',
            data: [41,37,16,3,3],
            options: {
                variant: 'pie',
                radius: 75,
                centerx: 170,
                linewidth: 2,
                strokestyle: 'white',
                shadow: false,
                textAccessible: true
            }
        }).roundRobin();

        var donut1 = new RGraph.Pie({
            id: 'cvs',
            data: [36,42,8,10,4],
            options: {
                variant: 'donut',
                radius: 100,
                centerx: 170,
                variantDonutWidth: 50,
                linewidth: 2,
                strokestyle: 'white',
                shadow: false,
                textAccessible: true
            }
        }).roundRobin();

        var donut2 = new RGraph.Pie({
            id: 'cvs',
            data: [40,35,10,7,8],
            options: {
                key: ['Internet Explorer','Chrome','Firefox','Safari','Opera'],
                keyColors: ['red','#ccc','#0f0','blue','pink'],
                keyPositionGraphBoxed: false,
                keyPositionY: 125,
                variant: 'donut',
                radius: 125,
                centerx: 170,
                variantDonutWidth: 35,
                linewidth: 2,
                strokestyle: 'white',
                shadow: false,
                textAccessible: true
            }
        }).roundRobin();
    };
</script>