function bookmark(title, url) { 
 if (window.external || window.sidebar || (window.opera && window.print)) { 
 
  
  if (title == undefined)  
   title = document.title;  
  if (url == undefined)  
   url = top.location.href;  
  if (window.sidebar) {  
   // Firefox  
   window.sidebar.addPanel(title, url, '');  
  } else if (window.opera && window.print) {  
   // Opera  
   var t = document.createElement('a');  
   t.setAttribute('rel', 'sidebar');  
   t.setAttribute('href', url);  
   t.setAttribute('title', title);  
   t.click();  
  } else if(window.external ) {  
   // IE  
   window.external.AddFavorite(url, title);  
  }  
  else {  
 //???? ??? ???????? ???? ????????, ????, ?? ???? ??? ??????? ??????? ?? ??????????  
 //?? ??? ?????????? ????? ?????  
   alert('??? ?? ???????? ???????? ? ????????? ??????? CTRL-D.');  
  }  
  return false;  
      
 
 }  
 else {  
 //????????? ???????? ??? ??? ?????  
  this.agent = navigator.userAgent;  
  this.mac = this.agent.indexOf("Mac")-1;  
 //??? ????????? ?????????????? ???????  
  if (this.mac) document.write('??? ?? ???????? ???????? ? ????????? ??????? Command-D.');  
 //??? PC ???????  
  else document.write('??? ?? ???????? ???????? ? ????????? ??????? CTRL-D.');  
 } 
  }