title: Wait for background images in CSS to be fully loaded
body: <p>I have a web app that uses external background images loaded in external CSS.  Right now, it is possible to use the app before the images have fully rendered, creating weird visual effects.</p>
  
  <p>How can I halt script execution until the images are fully loaded?</p>
  
  <p>It can use normal JavaScript or jQuery.  Because the images are loaded in external CSS the normal triggers I have read about don't work.</p>