jQuery: how to use the DOMNodeInserted event

HTML

<body>
<p><button id="insert">Insert</button><button id="delete">delete</button>
    <p id="rem">remove me or add me</p>
</p>
</body>

JavaScript

$('body').on('DOMNodeRemoved DOMNodeInserted','#rem', function(e) {
   alert("Changed");
});
$('#delete').click(function(){
$('#rem').remove();
});

$('#insert').click(function() {
   $('#rem').append("<p>kamd</p>");
});