JavaScript No right click

No right click

<body bgcolor="#000000" text=#00FF00>
<SCRIPT language=JavaScript1.2>
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;
document.onmousedown=norightclick;
</SCRIPT>
 Try the right mouse button!
</body>