<!DOCTYPE html>

<html>

<head>

</head>

<body>

<div class="welcome">Welcome To JDoodle.com</div>

<body>

</html>

$(document).ready(function() { $(".welcome").append("!!!"); });

</script>

.welcome { color:green; font-size:36px; font-family:cursive; text-align:center; padding:20px; }

</style>

Result