sağ tık engeli hakkında ?

<script language=JavaScript>
<!--
   if ( window.Event )
      document.captureEvents( Event.MOUSEUP );

   function nocontextmenu()
   {
      event.cancelBubble = true, event.returnValue = false;
      return false;
   }

   function norightclick( e )
   {
      if ( window.Event )
      {
         if ( e.which == 2 || e.which == 3 )
            return false;
      }
      else if (event.button == 2 || event.button == 3)
      {
         event.cancelBubble = true, event.returnValue = false;
         return false;
      }
   }

   if ( document.layers )
      document.captureEvents( Event.MOUSEDOWN );

   document.oncontextmenu = nocontextmenu;
   document.onmousedown = norightclick;
   document.onmouseup = norightclick;

   function notaccept(e)
   {
      return false;
   }

   document.onmousedown = notaccept;
   document.onselectstart = new Function( "return false" );
// -->
    </script></div>