<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("p").removeAttr("id class");
});
});
</script>
<style>
#p1 {
color: white;
background-color: green;
font-size: 20px;
padding: 5px;
}
.blue {
color: white;
background-color: blue;
font-size: 20px;
padding: 5px;
}
</style>
</head>
<body>
<h1>This is a heading</h1>
<p id="p1">This is a paragraph.</p>
<p class="blue">This is another paragraph.</p>
<button>Remove id and class attribute from all p elements</button>
</body>
</html>