hom = new Image(); hom.src="pic/home.gif";  homo = new Image(); homo.src="pic/homeo.gif";
mai = new Image(); mai.src="pic/mail.gif";  maio = new Image(); maio.src="pic/mailo.gif";
fav = new Image(); fav.src="pic/fav.gif";   favo = new Image(); favo.src="pic/favo.gif";
sta = new Image(); sta.src="pic/start.gif"; stao = new Image(); stao.src="pic/starto.gif";