ItemCollapsed プロパティ (DataMenuClientEvents)

// The client event 'ItemCollapsed' takes two parameters sender and e
       // sender  is the object which is raising the event
       // e is the DataMenuItemCancelEventArgs
       
       function WebDataMenu1_ItemCollapsed(sender, e) {
           //Gets the DataMenuItem object that is collapsed
           var Item = e.getItem();

           //Gets the text of the collapsed item
           var ItemText = Item.get_text();

           alert("Item '"+ ItemText +"'Collapsed!!!");
           
       }