Drill Down with Ext Cahrts?

ExtJS Charts, I am using an Ext column chart and I want to implement some drill down and drill up functionality. Ho开发者_开发百科w can I do that? Is this even possible?

After some surfing days in the web I found a solution: Highcharts (at www.highcharts.com, sorry for this I am new in this site so I can only post one link :-( the other link was bigger so...) which is a charting library implemented in js, also there is an adapter for Ext so the road is quite a bit simple. The drill-down functionality is not embedded in library but you can handle events related which each series, bar or point in the chart. regards