A Bar chart combined with a Line chart

[No canvas support]

This goes in the documents header:
<script src="RGraph.common.core.js"></script>
<script src="RGraph.common.effects.js"></script>
<script src="RGraph.line.js"></script>
<script src="RGraph.bar.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>
    bar = new RGraph.Bar({
        id: 'cvs',
        data: [-2.25,-1.8,0.1,1.95,2.2,2.8,4.3,5.7,6,4.3,5.5,6.5,6.45,5.5,5.4, 5.4],
        options: {
            marginBottom: 40,
            xaxisPosition: 'center',
            backgroundGridVlinesCount: 0,
            backgroundGridHlinesCount: 8,
            yaxisLabelsCount: 8,
            yaxisTickmarksCount: 8,
            colorsStroke: 'rgba(0,0,0,0)',
            xaxisLabels: [
                'Q1\r\n2009','Q2\r\n2009','Q3\r\n2009','Q4\r\n2009',
                'Q1\r\n2010','Q2\r\n2010','Q3\r\n2010','Q4\r\n2010',
                'Q1\r\n2011','Q2\r\n2011','Q3\r\n2011','Q4\r\n2011',
                'Q1\r\n2012','Q2\r\n2012','Q3\r\n2012','Q4\r\n2012'
            ],
            yaxisScaleMax: 8
        }
    });



    //var line = new RGraph.Line({
    //    id: 'cvs',
    //    data: [-2,-1,0.5,2.2,2.8,3.2,4.7,5.7,5.9,4.5,6.5,7.5,6.8,5.8,5.8],
    //    colors: ['#000'],
    //    xaxisPosition: 'center',
    //    yaxisScaleMax: 8,
    //    linewidth: 4,
    //    tickmarksStyle: null
    //});


    line = new RGraph.Line({
        id: 'cvs',
        data: [-2,-1,0.5,2.2,2.8,3.2,4.7,5.7,5.9,4.5,6.5,7.5,6.8,5.8,5.8,6.0],
        options: {
            colors: ['#000'],
            xaxisPosition: 'center',
            yaxisScaleMax: 8,
            linewidth: 4,
            tickmarksStyle: null
        }
    });

    combo = new RGraph.CombinedChart(bar, line)
        .draw();
</script>