$(function(){
		   
	$('#preferiti').click(function(){	   
		if (window.sidebar) { // Mozilla uses sidebar 
			window.sidebar.addPanel( document.title, window.location , "");
		} else if (window.external) { // IE uses window.external
			window.external.AddFavorite( window.location, document.title );
		} else { // Who knows ?  Only have to support IE & Moz anyhow.
			alert("Sorry! Your browser doesn't support this function.");
		}		
	});
})