function check()
    {
       if($.trim($("#Top1_tbusername").val())=="")
       {
           alert("请输入用户名！");
           return false;
       }
       if($.trim($("#Top1_tbpwd").val())=="")
       {
           alert("请输入密码！");
           return false;
       }
    }
    function addfavorite(sURL, sTitle) {   
    var sURL=window.location;
    var sTitle=document.title;
    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");   
        }   
    }   
}