title: jQuery watch div
body: <p>Is there any way to watch, if the content within a div changes?</p>
  
  <p>Let's say I have:</p>
  
  <pre><code>&lt;div id="hello"&gt;&lt;p&gt;Some content here&lt;/p&gt;&lt;/div&gt;
  </code></pre>
  
  <p>Which at some point 5 seconds later changes to:</p>
  
  <pre><code>&lt;div id="hello"&gt;&lt;ul&gt;&lt;li&gt;This is totally different!&lt;/li&gt;&lt;/ul&gt;&lt;/div&gt;
  </code></pre>
  
  <p>How can I be notified of this via a callback or something else? I can in most cases get the javascript that's doing the inserting, to tell me. But I wanted to know if it was possible. </p>