title: jQuery accordion active: not working in Firefox using ID tag
body: <p>In IE, Chrome, Safari &amp; Opera this works:</p>
  
  <pre><code>&lt;a id="VY" class="menu-title"&gt;Very Young&lt;/a&gt;
  
  $("#accordion").accordion({
    autoHeight: false,
    collapsible: true,
    header: '.menu-title',
    navigation: true,
    event: 'click',
    active: VY,
    animated: 'easeslide'
  });
  </code></pre>
  
  <p>My accordion menu opens at the 'Very Young' link <code>id="VY"</code></p>
  
  <p>But in Firefox it doesn't, it displays the menu with all items open.
  Is it possible to get Firefox to display it like the others or is there a JavaScript/jQuery method to get the index of the item with an id of e.g. 'VY' which is what enables it to open the menu at the appropriate place e.g. active: 3.</p>