function bookmark(url, title) {
    var saf;
    n = navigator;
    nav = n.appVersion;
    nan = n.appName;
    nua = n.userAgent;
    nv = n.vendor;
    if ((nua.indexOf('Safari') != -1) && (nv.indexOf('Apple') != -1)) {
        alert("Press CTRL-D (Safari)");
    } else if ((nan == "Microsoft Internet Explorer") && (parseInt(nav) >= 4)) {
        window.external.AddFavorite(url, title);
    } else if (nan == "Netscape") {
        window.sidebar.addPanel(title, url, "");
    } else {
        alert("Press CTRL-D (Netscape) or CTRL-T (Opera) to bookmark");
    }
}