title: jQuery move all children to another div
body: <p>I have a <code>div</code> with many childen. How do I move all of them to another <code>div</code> using <code>jQuery</code>?<br>
  my code looks like: </p>
  
  <pre><code>jQuery("body").append("&lt;div id='popupWrapper'&gt;&lt;/div&gt;");
  var myID = $('.FloatingFrameLightBlue1').attr('id');
  jQuery(myID).children().append("popupWrapper");
  </code></pre>
  
  <p>But it doesn't work. What I'm doing wrong?</p>