title: Traversing to a specific child element with Prototype
body: <p>Given the following markup.</p>
  
  <pre><code>&lt;div id="example"&gt;
    &lt;div&gt;
      &lt;div&gt;
        &lt;input type='hidden'&gt;&lt;/input&gt;
      &lt;/div&gt;
    &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>How can I quickly get the hidden input element given I have the ID for the top most div element with the ID 'example'?  </p>
  
  <p>I can hack away at it so I can just iterate through each child element until I hit the input, however, I'd like to improve on that and utilize Prototype and simply jump to that hidden input given the div.</p>
  
  <p>Thanks!</p>