function addBookmark(url) {

    var sUrl = location.href;
    var sTitle = document.title;

    if (url != '') { sUrl = url; }

    if (document.all) {
        window.external.AddFavorite(sUrl, sTitle);
    }
    else if (window.sidebar) {
        window.sidebar.addPanel(sTitle, sUrl, "");
    }
    else {
        alert('Sorry your browser does not support this feature.');
    }
}