var urlAddress = "http://www.rubbens.nl/bob";
var pageName = "Bobbel's Homepage!";

function addBookmark() {
        if (window.sidebar) { // firefox
              window.sidebar.addPanel(pagename, urlAdress,"");
        } else if( document.all ) { //MSIE
                window.external.AddFavorite( urlAdress, pagename);
        } else {
               alert("Sorry, your browser doesn't support this");
        }
}