title: Div position fixed scroll bar is not working
body: <p>I have made a pop box <code>&lt;div id="popBox"&gt; position:fixed; width:80%; height:80%;</code> at center of screen.</p>
  
  <p>I use jQuery <code>$('body').css('overflow', 'hidden');</code> when it opens. So users wont scroll the content behind the pop box.</p>
  
  <p>Here is the problem.</p>
  
  <p>1.fixed - scroll bar wont appear when window scale down.</p>
  
  <p>2.jQuery lock the body overflow-hidden. So the scroll bar will disappear.</p>
  
  <p>Is any way to solve this problem?</p>
  
  <p>here is fiddle
  <a href="http://jsfiddle.net/gAEut/" rel="nofollow">http://jsfiddle.net/gAEut/</a></p>