title: Detect a img src change
body: <p>I'am trying to detect if the source of a image is changed.</p>
  
  <p>In my case the src is changed from jquery, and i have no right's to change the jquery file.
  So im trying to detect the src change from a img element.</p>
  
  <p>I would like to see the source if the src is changed, just for testing</p>
  
  <p>This is my current code:</p>
  
  <pre><code>var divimg = document.getElementById("img_div");
  divimg.onchange = alert(divimg.getElementsByTagName('img')[0].src);
  </code></pre>
  
  <p>On the page load the alert react's and shows me the src, but not on a src change from jquery</p>