title: jquery index on list item issue
body: <p>I'm working on getting the index of a list item contained within a UL which has the class called zoomThumbActive.  I've tried just about every selector I can think of and always get -1 (not found). </p>
  
  <p>I've put all the code into a <a href="http://jsfiddle.net/UuWbK/17/" rel="nofollow">fiddle</a>: </p>
  
  <p>In this example, the answer should be 3. Any idea what I'm doing wrong?</p>