function segnalibro(url,title){
  if((navigator.appName == "Microsoft Internet Explorer") &&

(parseInt(navigator.appVersion) >= 4)){
    window.external.AddFavorite(url,title);
  }else if(navigator.appName == "Netscape"){
      window.sidebar.addPanel(title,url,"");
  }else{
    alert("Premi CTRL+D (Firefox e Netscape) o CTRL+T (Opera) per aggiungere la pagina ai Preferiti");
  }
}

function bookmark(url,title){
  if((navigator.appName == "Microsoft Internet Explorer") &&

(parseInt(navigator.appVersion) >= 4)){
    window.external.AddFavorite(url,title);
  }else if(navigator.appName == "Netscape"){
      window.sidebar.addPanel(title,url,"");
  }else{
    alert("Press CTRL+D (Firefox and Netscape) or CTRL+T (Opera) in order to add this site to your Favorites");
  }
}