title: jQuery using variable name instead id name
body: <p>I have a quick question. I don't know why this is not working.
  I am using a variable name instead the id.</p>
  
  <pre><code>var navWrapper = $('#nav');
  var headParentUL = $(this).parents(navWrapper + ' &gt; ul');
  </code></pre>
  
  <p>Thanks for the help.</p>