Untitled

<!DOCTYPE html>
<html>
<head>
<title>Javascript practice</title>
</head>
<body>
<button>Hey Fade me</button>
<div div="divthree">
<p>Hello world</p>
</div>


<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src="http://code.jquery.com/ui/1.9.2/jquery-ui.js"></script>
<script type="text/javascript" src="Testing.js"></script>
</body>
</html>

$(document).ready(function(){
    $("button").click(function(){
        $("#divthree").fadeOut(3000);
    });
});