if (window.Event) // Only Netscape will have the CAPITAL E.
      document.captureEvents(Event.MOUSEUP); // catch the mouse up event
 
      function nocontextmenu()  // this function only applies to IE4, ignored otherwise.
      {
       event.cancelBubble = true
       event.returnValue = false;
 
       return false;
      }
 
      function norightclick(e) // This function is used by all others
      {
      if (window.Event) // again, IE or NAV?
      {
      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;
      }
 
      }
 
      document.oncontextmenu = nocontextmenu;  // for IE5+
      document.onmousedown = norightclick;  // for all others