A Semi-circular Progress chart with tooltips

[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.semicircularprogress.js"></script>
Put this where you want the chart to show up:
<canvas id="cvs" width="300" height="200">
    [No canvas support]
This is the code that generates the chart:
    new RGraph.SemiCircularProgress ({
        id: 'cvs',
        min: 0,
        max: 20,
        value: 12,
        options: {
            tooltips: ['Hurrah!'],
            scaleDecimals: 1,
            scaleUnitsPost: 'Kg',
            labelsCenterSize: 30