title: Get frame source with jQuery (after the source has changed)
body: <p>This jQuery will return the source URL of a frame:</p>
  
  <pre><code>$('#frame-name').attr('src')
  </code></pre>
  
  <p>But if a link inside the frame is clicked, the original source is still returned.</p>
  
  <p>Is it possible to detect the new source URL? Or get the source of the new document loaded in the frame? If either of those is a yes, are there security constraints if the source frame contains an URL from a different domain?</p>