var URL = "http://www.typoloft.org";
var Text = 'Titel der Site';
function Lesezeichen(){
if (window.sidebar)
{
 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);
    }
}