How to deal with drop-down tabs dynamics crm 2011
Solution 1:
You want expand or collapse a tab in Onload of form, right?
So you have to use this function:
Xrm.Page.ui.tabs.get("tabname").setDisplayState('expanded');
Xrm.Page.ui.tabs.get("tabname").setDisplayState('collapsed');
The state of the tab is independently of the content.