var submenuOn = new Array(0, 0);

function showSubmenu(submenuNbr, isSubmenu) {
	if (isSubmenu){
		submenuOn[submenuNbr] = 1;
	}
	
	document.getElementById("submenu" + submenuNbr).style.visibility = 'visible';
}

function hideSubmenu(submenuNbr, isSubmenu) {
	if (isSubmenu){
		submenuOn[submenuNbr] = 0;
	}else if (submenuOn[submenuNbr] == 1){
		return;
	}
	
	document.getElementById("submenu" + submenuNbr).style.visibility = 'hidden';
}