无法破解的JAVA代码

<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)
  { 
  alert("1")
   event.cancelBubble = true
   event.returnValue = false;
   return false;
  }
 
}
 
document.oncontextmenu = nocontextmenu;  // for IE5+
document.onmousedown = norightclick;  // for all others
//-->
</script>