function bookmark(url, title) {

    if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {
        window.external.AddFavorite(url, title);
    } else if (navigator.appName == "Netscape") {
        if (navigator.userAgent.indexOf('Firefox') > 0) {
            window.sidebar.addPanel(title, url, "");
        }
        if (navigator.userAgent.indexOf('Safari') > 0) {
            alert("Press CTRL-D (Windows) or CMD-D (Mac) to bookmark");
        }
    } else {
        alert("Press CTRL-D (Netscape) or CTRL-T (Opera) to bookmark");
    }
}