function getBrowserInfo() { 
var t,v = undefined; 
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' && 7 > 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("Press CTRL-D, to add this page to your bookmarks."); 
return false; 
}