A Bar chart with Pie charts in tooltips

This Bar chart shows how you can have charts in tooltips. It uses the new DOM1 style of adding the tooltip event. This tooltip event creates the chart in the tooltip.

[No canvas support]

This goes in the documents header: 
<script src="RGraph.common.core.js"></script>
<script src="RGraph.common.dynamic.js"></script>
<script src="RGraph.common.tooltips.js"></script>
<script src="RGraph.common.effects.js"></script>
<script src="RGraph.pie.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: