function bookmark(url, description) 
 { 
 netscape="First push OK and then hit CTRL+D to add a bookmark to this site." 
  
 if (navigator.appName=='Microsoft Internet Explorer') 
 { 
 window.external.AddFavorite(url, description); 
 } 
 else if (navigator.appName=='Netscape') 
 { 
 alert(netscape); 
 } 
 }