A basic example of a chart created using dynamic updates

[No canvas support]

This goes in the documents header:
<script src="RGraph.common.core.js"></script>
<script src="RGraph.line.js"></script>
Put this where you want the chart to show up:
<canvas id="cvs" width="600" height="250">
    [No canvas support]
</canvas>
This is the code that generates the chart:
<script>
    // Prefill the data array
    for (i=0,data=[];i<600; ++i) data[i] = null;

    var line = new RGraph.Line({
        id: 'cvs',
        data: data,
        options: {
            xaxisLabels: ['60s','55s','50s','45s','40s','35s','30s','25s','20s','15s','10s','5s','0s'],
            xaxisTickmarksCount: 12,
            yaxisScaleMax: 100,
            marginLeft: 35,
            tickmarksStyle: null,
            shadow: null,
            backgroundGridBorder: false,
            backgroundGridVlines: false,
            axes: false,
            linewidth: 1
        }
    }).draw();


    var last = RGraph.random(0,100);

    function draw ()
    {
        last = RGraph.random(last - 5, last + 5);
        last = Math.min(last, 100);
        last = Math.max(last, 0);
        
        // Set the data on the RGraph object
        line.original_data[0].push(last);
        line.original_data[0].shift();

        // Clear the canvas
        RGraph.clear(line.canvas);
        line.draw();

        setTimeout(draw, 100);
    }
    
    draw();
</script>