title: How to show loading animation with fancybox?
body: <p>I got fancybox working but I have this problem:
  First, I can't make the loading image appear. And second, if I use a link to show an image on click, sometimes it fails to show it, because of the time it takes to load it (if it were an image instead of a link, it would have been already loaded by the browser, that's why it never fails with images).</p>
  
  <p>In summary, I have a link, when I click it a modal window with an image should appear. Instead, a white box appears. If I reload the page, sometimes the image appears, sometimes it doesn't.</p>