title: Detect Click into Iframe using JavaScript
body: <p>I understand that it is not possible to tell what the user is doing inside an <code>iframe</code> if it is cross domain.  What I would like to do is track if the user clicked at all in the <code>iframe</code>.  I imagine a scenario where there is an invisible <code>div</code> on top of the <code>iframe</code> and the the <code>div</code> will just then pass the click event to the <code>iframe</code>.  </p>
  
  <p>Is something like this possible?  If it is, then how would I go about it?  The <code>iframes</code> are ads, so I have no control over the tags that are used.</p>