function mmenu(mID) {
	var menu = document.getElementById(mID);
	var display = menu.style.display;
	menu.style.display = (display == "block") ? "none" : "block";
	menu.parentNode.style.listStyleImage = (display == "block") ? "url(./images/img/cartellachiusa.gif)" : "url(./images/img/cartellaaperta.gif)";
}

window.onload = function() {
	var uls = document.getElementsByTagName("ul");
	for (i=0;i<uls.length;i++) {
		if(uls[i].className=="submenu")uls[i].style.display = "none";
	}
}