A Donut chart showing percent complete

This goes in the documents header:

<script src="RGraph.common.core.js"></script>
<script src="RGraph.drawing.text.js"></script>
<script src="RGraph.pie.js"></script>

Put this where you want the chart to show up:

<canvas id="cvs" width="450" height="450">
    [No canvas support]
</canvas>

This is the code that generates the chart:

<script>
    var target    = 73,
        increment = 2;
    
    
    //
    // This donut is the background    
    var donut = new RGraph.Pie({
        id: 'cvs',
        data: [1],
        options: {
            variant: 'donut',
            colors: ['rgba(0,128,0,0.25)'],
            strokestyle: 'rgba(0,0,0,0)'
        }
    }).draw()

    var donut = new RGraph.Pie({
        id: 'cvs',
        data: [target,27],
        options: {
            variant: 'donut',
            colors: ['green','rgba(0,0,0,0)'],
            strokestyle: 'rgba(0,0,0,0)',
            shadow: false
        }
    }).on('draw', function (obj)
    {
        // Update the text object with the value shown on the Donut chart
        if (text) {
            text.text = parseInt(target * obj.get('effect.roundrobin.multiplier')) + '%';
        }
    }).roundRobin(null, function ()
    {
        text.set('textAccessible', true);
        RGraph.redraw();
    })




    var text = new RGraph.Drawing.Text({
        id: 'cvs',
        x: donut.centerx,
        y: donut.centery,
        text: '0%',
        options: {
            size: 52,
            halign: 'center',
            valign: 'center'
        }
    }).draw();
</script>