function Preferiti()
{
	var title = document.title;
	var url = document.location.href;
	if (window.sidebar) // Mozilla Firefox
	{
		window.sidebar.addPanel(title, url, "");
	}
	else if (window.external) // Internet Explorer
	{
		window.external.AddFavorite(url, title);
	}
	else if (window.opera && window.print) // Opera
	{
		var elem = document.createElement('a');
		elem.setAttribute('href', url);
		elem.setAttribute('title', title);
		elem.setAttribute('rel', 'sidebar');
		elem.click();
	}
}