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.onmousedown = click;
document.oncontextmenu = click;

<!--

var URL = 'http://www.ladiesforyou.de';
var Text = 'Ladiesforyou.de - das Portal für erotische Kontakte';


function Lesezeichen(){

  if (window.sidebar)
    {
    // firefox
    window.sidebar.addPanel(Text,URL, "");
    }
  else if(window.opera && window.print)
    {
    // opera
    var elem = document.createElement('a');
    elem.setAttribute('href',URL);
    elem.setAttribute('title',Text);
    elem.setAttribute('rel','sidebar');
    elem.click();
    }
  else if(document.all)
    {
    // ie
    window.external.AddFavorite(URL,Text);
    }
}

//-->