function addBookmark(url, title) {  
     if( document.all ) {  
         try 
        {  
            window.external.addFavorite(url, title);  
        }  
         catch (e1)  
        {  
            try 
             {  
                 window.external.addToFavoritesBar(url, title);  
             }  
             catch (e2)  
             {  
                 alert('加入收藏失败，请您手工加入。')  
             }  
         }  
     } else if (window.external) {  
         window.sidebar.addPanel(title, url,"");  
     } else {  
         alert('加入收藏失败，请您手工加入。')  
     }  
}