title: jquery detect coordinate of top of page after scrolling
body: <p>I have a 'back button' that I would like to stick to the header until you scroll past a certain point (so I have it absolutely positioned but would like it positioned 'fixed' when you scroll past the header).</p>
  
  <p>Kinda like the 'GAMEHQ' section does here: <a href="http://scores.espn.go.com/mlb/preview?gameId=311027124" rel="nofollow">http://scores.espn.go.com/mlb/preview?gameId=311027124</a></p>
  
  <p>Any suggestions? Thanks!</p>