A Bar chart customised to look like the millionaire bar chart

This is an example of a Bar chart that has been customised to have an appearance similar to the "Who wants to be a millionaire" "Ask the Audience" results bar chart. It uses the ondraw event in-conjunction with the API in order to draw the text above the bars. The background gradient is done with a CSS linear-gradient - it's not drawn on the canvas. The background grid is customised in linewidth and color, the axes are disabled and the text colour is customised too.

There's an SVG version of this chart here.

[No canvas support]

This goes in the documents header:
<script src="RGraph.common.core.js"></script>
<script src="RGraph.bar.js"></script>
Put this where you want the chart to show up:
<canvas id="cvs" width="300" height="250" style="border-radius: 6px; background-image: linear-gradient(45deg, black, blue, black); box-shadow: #aaa 2px 2px 2px">[No canvas support]</canvas>
    [No canvas support]
This is the code that generates the chart:
    labels = [50,20,15,15];
    data   = RGraph.arrayClone(labels);

    var bar = new RGraph.Bar({
        id: 'cvs',
        data: data,
        options: {
            textAccessible: true,
            backgroundGridAutofitAlign: false,
            backgroundGridAutofitNumvlines: 8,
            backgroundGridAutofitNumhlines: 10,
            backgroundGridColor: '#6A93CA',
            backgroundGridWidth: 3,
            ymax: 100,
            gutterLeft: 10,
            gutterRight: 10,
            gutterTop: 30,
            gutterBottom: 45,
            ylabels: false,
            labels: ['A','B','C','D'],
            labelsColor: 'yellow',
            noaxes: true,
            textSize: 22,
            textColor: 'rgba(0,0,0,0)',
            textFont: 'Verdana',
            strokestyle: 'rgba(0,0,0,0)'
    }).grow().on('draw', function ()
        // Add the labels
        for (var i=0; i<4; i++) {
            RGraph.text2(bar.context, {
                text: labels[i] + '%',
                x:bar.coords[i][0] + (bar.coords[i][2] / 2),
                color: 'white',
                size: 18,
                halign: 'center',
                font: 'Verdana'