title: Menu with fixed top and relative left
body: <p>The facebook appcenter menu has fixed top and relative left. It looks like it's updating from javascript. Does anyone know how to do that? Or if there is a plugin out there like this? I can't for the life of me find it.</p>
  
  <p><a href="http://www.facebook.com/appcenter/?from_bookmark=1" rel="nofollow">http://www.facebook.com/appcenter/?from_bookmark=1</a></p>