function addfavorite2() {
    var url = window.location;
    var title = document.title;
    var ua = navigator.useragent.tolowercase();
    if (ua.indexof("360se") > -1) {
        alert("由于360浏览器功能限制，请按 ctrl+d 手动收藏！");
    }
    else if (ua.indexof("msie 8") > -1) {
        window.external.addtofavoritesbar(url, title); //ie8
    }
    else if (document.all) {
        try {
            window.external.addfavorite(url, title);
        } catch (e) {
            alert('您的浏览器不支持,请按 ctrl+d 手动收藏!');
        }
    }
    else if (window.sidebar) {
        window.sidebar.addpanel(title, url, "");
    }
    else {
        alert('您的浏览器不支持,请按 ctrl+d 手动收藏!');
    }
}