A dynamic Thermometer chart

This goes in the documents header:

<script src="RGraph.common.core.js"></script>
<script src="RGraph.common.effects.js"></script>
<script src="RGraph.thermometer.js"></script>

Put this where you want the chart to show up:

<canvas id="cvs" width="100" height="400">
    [No canvas support]
</canvas>

This is the code that generates the chart:

<script>
    window.onload = function ()
    {
        var value = RGraph.random(0, 100)
        
        if (typeof thermometer == 'undefined') {
            
            // A global on purpose
            thermometer = new RGraph.Thermometer({
                id: 'cvs',
                min: 0,
                max: 100,
                value: value,
                options: {
                    textAccessible: true
                }
            });
        } else {
            thermometer.value = value;
        }

        thermometer.grow()
        
        setTimeout(function ()
        {
            RGraph.clear(thermometer.canvas);
            func();
        }, 5000);
    };
</script>