function getBrowserInfo() { 
  var t,v = undefined; 
 
  if (window.chrome) t = 'Chrome'; 
  else if (window.opera) t = 'Opera'; 
  else if (document.all) { 
  t = 'IE'; 
  var nv = navigator.appVersion; 
  var s = nv.indexOf('MSIE')+5; 
  v = nv.substring(s,s+1); 
  } 
  else if (navigator.appName) t = 'Netscape'; 
 
  return {type:t,version:v}; 
 } 
 
 function bookmark(a){ 
  var url = window.document.location; 
  var title = window.document.title; 
  var b = getBrowserInfo(); 
 
  if (b.type == 'IE' && 8 >= b.version && b.version >= 4) { window.external.AddFavorite(url,title); }
  else if (b.type == 'Opera') { 
  a.href = url; 
  a.rel = "sidebar"; 
  a.title = url+','+title; 
  return true; 
  } 
  else if (b.type == "Netscape") window.sidebar.addPanel(title,url,""); 
  else alert("Нажмите CTRL-D, чтобы добавить страницу в закладки."); 
  return false; 
 }