为什么不显示啊？

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
</head><body>
<p>
<h6>h6kaishi</h6>
<p>
<h6>h6</h6>
<div id='divId'>
<h6>a</h6>
<h6>b</h6>
<h6>c</h6>
<h6>d</h6>
</div>
</p>
</p>
<div id='divs'></div>
<script type='text/javascript'>
$('#divs').html($('#divId').parents("p").children().text());
</script>
</body>
</html>id为divs的div为什么不显示啊？