title: CSS Transitions Not working after toggleClass()
body: <p>I created a toggle-menu, as shown in <a href="http://jsfiddle.net/85Ryan/Hrsdw/1/" rel="nofollow noreferrer">this demo</a>.</p>
  <p>I addded a css transition effect for <code>div.nav-menu</code>, and i used <code>max-height:0;</code> to <code>max-height:480px;</code>.</p>
  <p>When I click the menu toggle to show the menu, the transition works well. But when I click the menu toggle to hide the menu again the transition doesn't work.</p>
  <p>What did I do wrong?</p>