var menuList = new Array("subMenu01", "subMenu02", "subMenu03", "subMenu04", "subMenu05", "subMenu06", "subMenu07", "subMenu08", "subMenu09", "subMenu10");

function openMenu(id) {
	for(var i = 0; i < menuList.length ; i++){
		if (menuList[i] == id) {
		   document.getElementById(menuList[i]).style.visibility = 'visible';
		}else {
		   document.getElementById(menuList[i]).style.visibility = 'hidden';
		}
	}
}

function closeMenuAll() {
	for(var i = 0; i < menuList.length ; i++){
	   document.getElementById(menuList[i]).style.visibility = 'hidden';
	}
}