// ???????? ? ?????????
 function add_favorite(a) {
   title=document.title;
   url=document.location;
   try {
     // Internet Explorer
     window.external.AddFavorite(url, title);
   }
   catch (e) {
     try {
       // Mozilla
       window.sidebar.addPanel(title, url, "");
     }
     catch (e) {
       // Opera
       if (typeof(opera)=="object") {
         a.rel="sidebar";
         a.title=title;
         a.url=url;
         return true;
       }
       else {
         // Unknown
         alert('??????? Ctrl-D ????? ???????? ???????? ? ????????');
       }
     }
   }
   return false;
 }