<!DOCTYPE html>
<html>
<head>
<script src="/lib/jquery-1.12.2.min.js"></script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("p").replaceWith(function(n){
return "<h3>This element has index " + n + ".</h3>";
});
});
});
</script>
</head>
<body>
<h1>This is a heading</h1>
<p>This is a paragraph.</p>
<p>This is another paragraph.</p>
<p>This is another paragraph.</p>
<button>Replace each p element</button>
</body>
</html>