title: How to move an element into another element?
body: <p>I would like to move one DIV element inside another. For example, I want to move this (including all children):</p>
  
  <pre><code>&lt;div id="source"&gt;
  ...
  &lt;/div&gt;
  </code></pre>
  
  <p>into this:</p>
  
  <pre><code>&lt;div id="destination"&gt;
  ...
  &lt;/div&gt;
  </code></pre>
  
  <p>so that I have this:</p>
  
  <pre><code>&lt;div id="destination"&gt;
    &lt;div id="source"&gt;
      ...
    &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>