title: How do I make a div follow me as I scroll down the page?
body: <p>The user enters the site. </p>
  
  <p>At this point, the div is in the middle of the page.</p>
  
  <p>As he scrolls down the page, the div first begins to move upward, but once it hits the top, it stays there.</p>
  
  <p>As he scrolls further down the page, the div stays near the top, always visible to the user.</p>
  
  <p>As he scrolls up the page all the way to the top, the div once again stays back in position where it was originally.</p>