var message="Sorry, copyright © Klaus Schenke";

    function click(e)
    {
      if (navigator.appName == 'Netscape' && (e.which == 3 || e.which == 2))
        return false;
      else if (navigator.appName == 'Microsoft Internet Explorer' &&
        (event.button == 2 || event.button == 3))
        {
          alert(message);
          return false;
        }
      return true;
    }
   document.onmousedown=click;
      if (document.layers)
      window.captureEvents(Event.MOUSEDOWN);
    window.onmousedown=click;