I'm hoping someone can help and that this mightn't be a difficult one.
Ideally with a drill-down I'd use a 'Fetch' call to an AJAX library in the format: onclick="Fetch('ModuleID','0','Drilldown=Lvl1&Detail=Item1') for example, to reload the chart section of the screen including html headings/data etc. This would pick up on the querystring like the Detail = Item1 and the XML data for that and present the drill-down chart.
The alternative I have is to simply change the chart XML using a drilldown link which is in a format along the lines "Default.aspx?XML=True&Drilldown=Lvl1&Detail=Item1" (just the XML file here). This is less desirable as I'd like the chart drill-down to use AJAX to refresh more than just the chart itself.
I'm not sure if this is clear, but is there a way to achieve the above with a drill-down link?