title: Background Check JS
body: <p>I have a question in regards to this <a href="http://kennethcachia.com/background-check" rel="nofollow">plug in</a>, hopefully someone can help me out</p>
  
  <p>I have a background image that is set via JavaScript after a particular page has loaded. The background can at any point be a light or dark image, loaded by the user. The plug in works well when the images are known at run time (as in the -css and -fullscreen demos), but fails to allow developers to check whether the background is embedded in the body.</p>
  
  <p>I tried modifying the plugin to fit my needs but every attempt thus far breaks the plugin.</p>
  
  <p>Is is possible to retrieve the image data from a dynamically assigned background image after it has been set by JS?</p>
  
  <p>Loading the base64 image into a <code>&lt;canvas /&gt;</code> is not working for me either as the image should, but does not get rendered (img.onload never gets fired) after appending it as a child to the current document instance.</p>