How can I check if a background image is loaded?
<p>I want to set a background image on the body tag, then run some code - like this:</p>

<pre><code>$('body').css('background-image','http://picture.de/image.png').load(function() {
    alert('Background image done loading');
    // This doesn't work
});
</code></pre>

<p>How can I make sure the background image is fully loaded?</p>
