A graduated SVG Semi-circular Progress chart

A Semi-circular Progress which has been configured with a gradient as the color. Other than that (and the units on the center label) it's a pretty standard progress.

This goes in the documents header:
<script src="RGraph.svg.common.core.js"></script>
<script src="RGraph.svg.semicircularprogress.js"></script>
Put this where you want the chart to show up:
<div style="width: 450px; height: 250px" id="chart-container"></div>
This is the code that generates the chart:
    scp = new RGraph.SVG.SemiCircularProgress({
        id: 'chart-container',
        min: 0,
        max: 100,
        value: 78,
        options: {
            title: 'A meter depicting the tanks volume',
            colors: ['Gradient(#060:#3c3:#3c3:#3c3)'],
            labelsCenterDecimals: 1,
            labelsCenterUnitsPost: '%'