A demo of the Chrome-only dotted or dashed background grid

This uses the newer addition to canvas from the canvas v5 specification - native dotted and dashed lines. As browsers add support you will be able to use the option in those too but initially it's only supported in Chrome.

obj.Set('background.grid.dashed', true);
obj.Set('background.grid.dotted', true);

This goes in the documents header:

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

Put this where you want the chart to show up:

<canvas id="cvs1" width="600" height="250">[No canvas support]</canvas>
<canvas id="cvs2" width="600" height="250">[No canvas support]</canvas>

This is the code that generates the chart:

<script>
    window.onload = function ()
    {
        var hbar = new RGraph.HBar({
            id: 'cvs1',
            data: [4,5,3,8,4,9,6,5,3],
            options: {
                labels: ['Mal', 'Barry', 'Gary', 'Neil', 'Kim', 'Pete', 'Lou', 'Fred', 'Jobe'],
                title: 'A dashed background grid',
                backgroundGridDashed: true,
                backgroundGridAutofitNumhlines: 9,
                gutterTop: 35
            }
        }).draw()

        var hbar2 = new RGraph.HBar({
            id: 'cvs2',
            data: [4,5,3,8,4,9,6,5,3],
            options: {
                labels: ['Mal', 'Barry', 'Gary', 'Neil', 'Kim', 'Pete', 'Lou', 'Fred', 'Jobe'],
                title: 'A dotted background grid',
                backgroundGridDotted: true,
                backgroundGridAutofitNumhlines: 9,
                gutterTop: 35
            }
        }).draw();
    };
</script>