function preInit() {
	
	if (openmenu>-1) {
		openMenu(openmenu);
	} else {
		closeMenus();
	}
	
}

function openMenu(menuid) {
	
	closeMenus();
	
	var menuname='menu' + menuid;
	
	document.getElementById(menuname).style.display='block';
	
}

function closeMenu(menuid) {
	
	var menuname='menu' + menuid;
	
	document.getElementById(menuname).style.display='none';
	
}

function closeMenus() {
	closeMenu(0);
	closeMenu(1);
	closeMenu(2);
}