Ajax Tab - javascript to check which tab is selected

Question

I have an AjaxControlToolKit TabContainer with 2 tabs that I load via a custom control in C#. On switching between tabs, I need to fire an event.

Which javascript event should I check for to determine which tab is selected?

Answer 1

var ai = $find('tc_id').get_activeTabIndex();
if (ai == "1") {
    setDetail1Sync();
}
else {
    setDetail0Sync();
}