var lastMenu = '';

function showMenu(input) {
	if (input == lastMenu) {
		document.getElementById('menu-' + input).className = 'hidden';
		lastMenu = '';
	} else {
		if (lastMenu != '') {
			document.getElementById('menu-' + lastMenu).className = 'hidden';
		}
		document.getElementById('menu-' + input).className = 'menu';
		lastMenu = input;
	}
}

function hideMenu() {
	if (lastMenu != '') {
		document.getElementById('menu-' + lastMenu).className = 'hidden';
		lastMenu = '';
	}
}