title: How can I determine if page is being viewed through lightbox?
body: <p>I have several sites I'm working on that are loading sub-pages via lightbox. The actual content is being found by Google, but the pages are hideous as they aren't meant to load all the headers and whatnot - this is content intended for lightbox delivery (ajax, fancybox).</p>
  
  <p>In PHP, or javascript if necessary, how might I determine if the content is being viewed in a lightbox or not? Would be nice to throw up a "view the original page" link or something.</p>