title: google ads displaying in front of everything despite z-index
body: <p>I have a website with some google ad banners and trying to use an overlay for a login form but some (not all) banner ads are displaying in front of the overlay. </p>
  
  <p>I did some googling and found that those ads display at a z-index of 100000 or something like that. </p>
  
  <p>I set the z-index of every portion of my overlay to 9999999999999 and still the ad appears in front. </p>
  
  <p>A picture of the problem is here: <a href="http://www.freemicsnyc.com/Freemics_v2.3/problem.jpg" rel="nofollow">http://www.freemicsnyc.com/Freemics_v2.3/problem.jpg</a></p>
  
  <p>Any suggestions would be appreciated. </p>