<a href="#">TIKLA</a>
<div>W3TR</div>
a{display: inline-block; background: #00FF99; padding:20px; border-bottom:4px solid #00CC00; color:#00CC99; text-decoration:none; margin-bottom:20px;}
div{width:150px; height:150px; background:red;}
$(document).ready(function(){
$("a").click(function(){
$("div").slideToggle();
});
});
This Pen doesn't use any external CSS resources.