<!DOCTYPE html>
<html>
<head>
<script src="js/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("h1,h2,p").removeClass("red");
});
});
</script>
<style type="text/css">
.important
{
font-weight:bold;
font-size:xx-large;
}
.blue
{
color:blue;
}
</style>
</head>
<body>
<h1 class="red">Heading 1</h1>
<h2 class="red">Heading 2</h2>
<p class="red">This is a paragraph.</p>
<p>This is another paragraph.</p>
<br>
<button>Remove class from elements</button>
</body>
</html>
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