Me.WebTab1.ClientEvents.TabMoving = "WebTab1_TabMoving"
this.WebTab1.ClientEvents.TabMoving = "WebTab1_TabMoving";
// The client event TabMoving takes two parameters sender and e // sender is the object which is raising the event // e is the TabMovingEventArgs function WebTab1_TabMoving(sender, e) { //Gets the index of the tab item involved in the event as an integer var tabIndex = e.get_tabIndex(); //Gets the visible index of the moving tab as an integer var tabVisibleIndex = e.get_tabVisibleIndex(); //Assuming you have a label called labelOutput on the form var label = $get('labelOutput'); if (tabIndex == 2) //Cancels the TabMoving event e.set_cancel(true); else label.innerHTML = "Tab with index '" + tabIndex + "' is moving..."; }