function click (e)
        {
          if (!e)
            e = window.event;
          if ((e.type && e.type == 'contextmenu') || (e.button && e.button == 2) || (e.which && e.which == 3))
          {
            if (window.opera)
              window.alert('Sorry: Diese Funktion ist deaktiviert.');
            return false;
          }
        }
        if (document.layers)
          document.captureEvents(Event.MOUSEDOWN);

        document.oncontextmenu = click;