window.onload = mousehandler;

	 var isNS = (navigator.appName == "Netscape") ? 1 : 0;
	  if(navigator.appName == "Netscape") document.captureEvents(Event.MOUSEDOWN||Event.MOUSEUP);
	  function mischandler(){
	   return false;
	 }
	  function mousehandler(e){
		var myevent = (isNS) ? e : event;
		var eventbutton = (isNS) ? myevent.which : myevent.button;
		if((eventbutton==2)||(eventbutton==3)) return false;
	 }
	 document.oncontextmenu = mischandler;
	 document.onmousedown = mousehandler;
	 document.onmouseup = mousehandler;