function bookmarkthis() {

    var title = document.getElementsByTagName("title")[0].text;
    var url = location.href;


    if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {

        window.external.AddFavorite(url, title);

    } else if (navigator.appName == "Netscape") {

        window.sidebar.addPanel(title, url, "");

    } else {

        alert("Press CTRL-D (Netscape) or CTRL-T (Opera) to bookmark");

    }

}