title: How does Facebook keep that toolbar on the bottom of the page?
body: <p>I like how <a href="http://en.wikipedia.org/wiki/Facebook" rel="nofollow noreferrer">Facebook</a> keeps that toolbar on the bottom of the page.</p>
  
  <p>Does that require cross-browser ninja skills?</p>
  
  <p>Their <a href="http://en.wikipedia.org/wiki/JavaScript" rel="nofollow noreferrer">JavaScript</a>/<a href="http://en.wikipedia.org/wiki/Cascading_Style_Sheets" rel="nofollow noreferrer">CSS</a> files are huge so I am having a hard time narrowing down the implementation (for learning purposes).</p>