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;