title: How to make facebook app authorization popup show in overlay on facebook page
body: <p>there is exactly what I saw.
  <a href="http://www.facebook.com/cocacola?sk=app_192765884109675" rel="nofollow">http://www.facebook.com/cocacola?sk=app_192765884109675</a>
  I don't know how they did it. I tried fb.ui change the display options. It always just give me a pop up window. so how to do the overlay? </p>
  
  <p>Thanks in advance!</p>