var uno = new Image();
uno.src = "images/int/uno.gif";
var due = new Image();
due.src = "images/int/due.gif";
var tre = new Image();
tre.src = "images/int/tre.gif";
var quattro = new Image();
quattro.src = "images/int/quattro.gif";
var cinque = new Image();
cinque.src = "images/int/cinque.gif";
var sei = new Image();
sei.src = "images/int/sei.gif";

function acc(quad) {
	document.images[quad].src = "images/int/" + quad + ".gif";
}
function spegni(quad) {
	document.images[quad].src = "images/int/vuoto.gif";
}