A black line chart

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" style="border-radius: 5px; box-shadow: 3px 3px 3px #ccc">
    [No canvas support]
</canvas>

This is the code that generates the chart:

<script>
    window.onload = function ()
    {
        var line = new RGraph.Line({
            id: 'cvs',
            data: [
                [7.0,6.9,9.5,14.5,18.2,21.5,25.2,26.5,23.3,18.3,13.9,9.6],
                [0.2,0.8,5.7,11.3,17.0,22.0,24.8,24.1,20.1,14.1,8.6, 2.5]
            ],
            options: {
                labels: ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'],
                shadow: false,
                noxaxis: true,
                noyaxis: true,
                colors: ['#0f0','#76D0FF'],
                tickmarks: function (obj, data, value, index, x, y, color, prevX, prevY)
                {
                    RGraph.path2(obj.context, ['b','lw', 2,'a',x, y, 4, 0, RGraph.TWOPI, false, 'f', null, , 's', 'black']);
                },
                linewidth: 3,
                textColor: '#eee',
                textAccessible: true
            }
        }).on('beforedraw', function (obj)
        {
            RGraph.clear(obj.canvas, 'black');
        }).trace2({frames: 15})
    };
</script>