function AddFav() {   //加入收藏  

    var ua = navigator.userAgent.toLowerCase();

    var sURL = document.URL;

    var sTitle = document.title;

    if (ua.indexOf("msie 8") > -1) {

        external.AddToFavoritesBar(sURL, sTitle, ‘‘);  

    }

    else {

        try {

            window.external.addFavorite(sURL, sTitle);

        }

        catch (e) {

            try {

                window.sidebar.addPanel(sTitle, sURL, "");

            }

            catch (e) {

                alert("加入收藏失败，请使用Ctrl+D进行添加");

            }

        }

    }

    return false;

}