Edit in JSFiddle

<body>
<p id="target">This css method of jQuery. This method applies CSS to controls.</p>
<button id="apply">Click ME!</button>
<button  onclick="location.reload()">Reset</button>
</body>
$(document).ready(function()
{
$('#apply').click(function()
{
$('#target').css({'color':'red','font-weight':'bold','font-family':'comic sans ms'});
});
});