dikucher, как вариант...
<!DOCTYPE html>
<html>
<head>
<script src="http://code.jquery.com/jquery-latest.js"></script>
<!--
<link rel="stylesheet" type="text/css" href="tmp.css" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="Content-Type" content="text/html; charset=windows-1251">
-->
<style type="text/css">
.new-block {
border: 1px solid red;
}
.old-block {
border: 1px solid green;
}
</style>
<script type="text/javascript">
$(function (){
$('button').click(function (){
$('.old-block').append($('.new-block > *'));
});
});
</script>
</head>
<body>
<div class="new-block">
<p>test</p>
<p>test</p>
</div>
<div class="old-block">
</div>
<button>Go</button>
</body>
</html>