var isNS = (navigator.appName == "Netscape") ? 1 : 0;
        var EnableRightClick = 0;
        if(isNS) 
        document.captureEvents(Event.MOUSEDOWN||Event.MOUSEUP);
        function mischandler(){
          if(EnableRightClick==1){ return true; }
          else {return false; }
        }
        function mousehandler(e){
          if(EnableRightClick==1){ return true; }
          var myevent = (isNS) ? e : event;
          var eventbutton = (isNS) ? myevent.which : myevent.button;
          if((eventbutton==2)||(eventbutton==3)) return false;
        }
        function keyhandler(e) {
          var myevent = (isNS) ? e : window.event;
          if (myevent.keyCode==96)
            EnableRightClick = 1;
          return;
        }
        document.oncontextmenu = mischandler;
        document.onkeypress = keyhandler;
        document.onmousedown = mousehandler;
        document.onmouseup = mousehandler;