title: jQuery lightbox plugin that scrolls with the page
body: <p>Some of the JavaScript lightbox effects that I've seen position the lightbox relative to the viewport, so that when you scroll the page you will still see the lightbox.</p>
  
  <p>The other kind are the ones that are positioned relative to the page contents.  If you scroll a page containing one of these, the lightbox moves with the rest of the page.</p>
  
  <p>I don't know what this second type is called (or if there is even a term for this behaviour).</p>
  
  <p>I've looked at <a href="http://fancybox.net/" rel="nofollow noreferrer">FancyBox</a> and <a href="http://www.ericmmartin.com/projects/simplemodal/" rel="nofollow noreferrer">SimpleModal</a>, but as far as I know, these are positioned relative to the viewport only.</p>
  
  <p>What jQuery plugin allows lightboxes that scroll with the page?</p>