Me.WebTab1.ClientEvents.TabMovedEnd = "WebTab1_TabMovedEnd"
this.WebTab1.ClientEvents.TabMovedEnd = "WebTab1_TabMovedEnd";
// The client event TabMovedEnd takes two parameters sender and e // sender is the object which is raising the event // e is the TabItemPostBackEventArgs function WebTab1_TabMovedEnd(sender, e) { //Gets the index of the closed tab var tabIndex = e.get_tabIndex(); //Assuming you have a label called labelOutput on the form var label = $get('labelOutput'); label.innerHTML = "Tab moving ended!"; }