A basic Gauge chart

[No canvas support]

This goes in the documents header:
<script src="RGraph.common.core.js"></script>
<script src="RGraph.gauge.js"></script>
Put this where you want the chart to show up:
<canvas id="cvs" width="250" height="250">
    [No canvas support]
</canvas>
This is the code that generates the chart:
<script>
    new RGraph.Gauge({
        id: 'cvs',
        min: 0,
        max: 10,
        value: 3.29,
        options: {
            labelsValueText: true,
            labelsValueTextDecimals: 2,
            labelsValueTextBounding: false,
            labelsValueTextYPos: 0.4,
            labelsValueTextUnitsPost: '%',
            labelsValueTextSize: 20,
            textSize: 18,
            colorsGreenColor: '#afa',
            colorsGreenWidth: 15,
            colorsRedWidth: 15,
            colorsYellowWidth: 15,
            labelsCentered: true,
            labelsOffsetAngle: 0,
            labelsOffsetRadius: 25,
            labelsOffsetx: 0,
            labelsOffsety: 0
        }
    }).draw();
</script>