A dual-scale Thermometer chart

[No canvas support]

This goes in the documents header:
<script src="RGraph.common.core.js"></script>
<script src="RGraph.drawing.yaxis.js"></script>
<script src="RGraph.bar.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>
    thermometer = new RGraph.Thermometer({
        id: 'cvs',
        min: 0,
        max: 20,
        value: 8,
        options: {
            scaleVisible: true,
            marginLeft: 25
        }
    }).grow();
    
    coords = thermometer.coords;
    
    yaxis = new RGraph.Drawing.YAxis({
        id: 'cvs',
        x: coords[0][0],
        options: {
            marginTop: thermometer.bulbTopCentery,
            marginBottom: thermometer.canvas.height - (coords[0][1] + coords[0][3]),
            yaxis: false,
            textColor: 'red',
            max: 100,
            min: 80
        }
    }).draw();
</script>