title: Using jQuery to change div from position:fixed to relative based on window scroll
body: <p>I'm trying to create a series of DIVs that become fixed at certain points during page scroll.
  I'm trying to do something similar to this:
  <a href="http://www.girlfriendnyc.com/#/portfolio/redsquareagency" rel="nofollow">http://www.girlfriendnyc.com/#/portfolio/redsquareagency</a></p>
  
  <p>Scroll down and you'll see what I'm talking about.</p>
  
  <p>Does anyone know of a plugin that already has this functionality or have any tips to get me started? I'm pretty good with jQuery, just not totally sure what path to take with this.</p>
  
  <p>Thanks!</p>