<!DOCTYPE html>
<html>
<body>

<h1>Hello, GitHub!</h1>

</body>
<script type="text/javascript">
    alert("Hello, GitHub!");
</script>
</html> 

<!DOCTYPE html>
<html>
<head>
    <title>Hello, GitHub!</title>
    <style>
        #content { 
            color: #FFFFFF;
            font-family: "Helvetica Neue";
        }
        div.page {
            background-color: #000000;
            width: 100%;
            height: auto;
            bottom: 0px;
            top: 0px;
            left: 0;
            position: absolute;
        }
        div.center {
            position: absolute;
            width: 215px;
            height: 100px;
            top: 47%;
            left: 47%;
            margin-top: -25px;
            margin-left: -50px;
        }
    </style>
</head>
<body>  
    <div class="page">
        <div class="center">
            <h1 id="content">Hello, GitHub!</h1>
        </div>
    </div>
</body>
<script src="js/jquery.min.js"></script>
<script type="text/javascript">
    $(document).ready(function() {
        $("#content").hover(function() {
            $( "div.page" ).css({
                "background-color" : "white"
            });
            $( this ).css({
                "color" : "black"
            });
        }, function() {
            $( "div.page" ).css({
                "background-color" : "black"
            });
            $ ( this ) .css ({
                "color" : "white"
            });
        });
    });
</script>
</html> 

Add jQuery and hover over text
Add jQuery and hover over text
