A clickable interactive Fuel chart

[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.effects.js"></script>
<script src="RGraph.fuel.js"></script>
Put this where you want the chart to show up:
<canvas id="cvs" width="250" height="250">
    [No canvas support]
This is the code that generates the chart:
    window.onload = function ()
        var fuel = new RGraph.Fuel({
            id: 'cvs',
            min: 0,
            max: 100,
            value: 96,
            options: {
                scaleVisible: true,
                colors: ['Gradient(white:blue)'],
                needleColor: 'blue',
                unitsPost: '%',
                textAccessible: true
        fuel.canvas.onclick = function (e)
            var obj   = e.target.__object__;
            var value = obj.getValue(e);
            obj.value = value;

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