Example
Solution 1:
$('#parent').prepend($('#child'));
Solution 2:
$('#child').prependTo($('#parent'));
Both solutions are prepending the element #child (adding at the beginning) to the element #parent.
Before:
<div id="parent">
<span>other content</span>
</div>
<div id="child">
</div>
After:
<div id="parent">
<div id="child">
</div>
<span>other content</span>
</div>
