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