Event log:

1. Singlecast event handling
   The singlecast event handling is the simplest way to execute user code when an event occurs. It is done by a direct assignment.

   <script type="text/javascript">
   function OnClicking(sender, eventArgs)
   { 
   	if (eventArgs.Item.NavigateUrl != "") 
   	{ 
   		var proceed = confirm("Navigate to "+ eventArgs.Item.NavigateUrl + " ?"); 
   		if (!proceed) 
   		{ 
   			return false; 
   		}
   	}
   } 
   </script>
   <radM:RadMenu ID="RadMenu1" runat="server" OnClientItemClicking="OnClicking"></>
   

2. Multicast event handling If you want multiple listeners to respond to a certain event, you should use multicast event handling. The example below demonstrates how to bind multiple event handlers to the OnClientItemClicked event of the menu.

   <script type="text/javascript">
   function OnClickedHandler1()
   {
   	alert("first handler called");
   }
   function OnClickedHandler2()
   {
   	alert("second handler called");
   }
   
   RadMenu1.AttachEvent("OnClientItemClicked", OnClickedHandler1);
   RadMenu1.AttachEvent("OnClientItemClicked", OnClickedHandler2);
   </script>
   

   Another advantage of multicast event handlers is the possiblity of detaching a certain handler dynamically. You may use the DetachEvent method of the menu object.

   <script type="text/javascript">
   RadMenu1.DetachEvent("OnClientItemClicked", OnClickedHandler1);
   </script>
   

3. Event hanlders formatting To conform with the Document Object Model we have exposed 3 available formats for event handler definition. These formats are supported both for singlecast and multicast event handling.
   1. Function reference First you define a function, then you pass a reference to it.

      <script type="text/javascript">
      function OnClickedHandler()
      {
          alert("first hadler called");
      }
      
      RadMenu1.OnClientItemClicked = OnClickedHandler;
      </script>
      

   2. Function name (string) First you define a function, then you pass its name as an event handler.

      <script type="text/javascript">
      
      function OnClickedHandler()
      {
          alert("first hadler called");
      }
      
      RadMenu1.OnClientItemClicked = "OnClickedHandler";
      
      </script>
      

   3. String containing executable code Useful for simple scenarios. The string passed is evaluated when the event handler is called.

      <script type="text/javascript">
      
      RadMenu1.OnClientItemClicked = "alert('first hadler called')";
      
      </script>
      

4. Cancelling an event
   In general, the events which are named with ing suffix (OnClientItemClicking for instance), can be cancelled if you explicitly return false from a handler. The following code cancels a menu item selection:

   <script type="text/javascript">
   
   function OnClientItemClickingHandler()
   {
       alert("item not clicked");
       return false;
   }
   
   RadMenu1.OnClientItemClicking = "OnClientItemClickingHandler";
   
   </script>