function bookmark(url, title) {
    if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {
        window.external.AddFavorite(url, title);
    }
    else if (window.sidebar) {  // Mozilla Firefox Bookmark
        window.sidebar.addPanel(title, url, "");
    }
    else {
        alert("Press CTRL-D to bookmark this page.");
    }
}