<html>
<head>
<script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
var x;
$("#btn1").click(function(){
x=$("p").detach();
});
$("#btn2").click(function(){
$("body").prepend(x);
});
});
</script>
</head>
<body>
<p>This is a paragraph.</p>
<button id="btn1">Remove p element</button>
<button id="btn2">Restore p element</button>
</body>
</html>