How to determine the top element?
<p>I have a complex structure of many nested, absolutely positioned elements.</p>

<p>These elements may or may not have their z-index set.</p>

<p>They also may or may not have the same parent element.</p>

<p>I am wondering what is the best / simplest way to return which element is on 'top'.  Something like the following...</p>

<blockquote>
  <p>$(".panel").topMost()</p>
</blockquote>

<p>Thanks (in advance) for your help</p>
