<html>
<head>
<title>Test</title> <meta charset="utf-8">
<style type="text/css">#menu{display: none;}</style>
<script>
function myFunction() {
var ff = document.getElementById('menu');
if (ff.style.display!="block") { ff.style.display = "block"; }
else { ff.style.display = "none";}
}
</script>
</head>
<body>
<div class="menu-container"><ul id="menu" class="menu-22">
<li><a href="#">Добавить </a></li>
<li><a href="#">Контакты</a></li>
<li><a href="#">Полезное</a></li>
</ul></div>
<button type="button" class="form-control" onclick="myFunction();"> Город </button>
</body>
</html>