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;   
      }   
  }   
  document.oncontextmenu   =   nocontextmenu;     //   for   IE5+   
  document.onmousedown   =   norightclick;     //   for   all   others