<body>
<h3>This is h3 element.</h3>
<p>This is paragraph element.</p>
<div>This is div element.</div>
<span>This is span element.</span><br/><br />
<button id="myButton">Click Me</button>
<button onclick="location.reload()">Reset</button>
</body>
$(document).ready(function()
{
$("#myButton").click(function()
{
$(":header").css({'font-size':'20px','background-color':'Orange'});
});
});