A basic SVG Gauge chart

This is a demo of an SVG Gauge chart

This goes in the documents header:
<script src="RGraph.svg.common.core.js"></script>
<script src="RGraph.svg.gauge.js"></script>
Put this where you want the chart to show up:
<div style="width: 300px; height: 300px" id="chart-container"></div>
This is the code that generates the chart:
<script>
    new RGraph.SVG.Gauge({
        id: 'chart-container',
        innerMin:0,
        innerMax:100,
        outerMin:0,
        outerMax:50,
        value: 78,
        options: {
            labelsIngraphUnitsPost: '%',
            labelsIngraphSize: '16',
            labelsIngraphBold: true
        }
    }).draw();
</script>