<html>
<head>
<style>

body {
    height:2000px;
    margin:0;
    overflow:hidden;
}

#background-container {
    margin:0;
    margin-top:50px;
    overflow:hidden;
    background-image:url(resources/green-blue.png);
    background-attachment:fixed;
    width:100%;
    height:100%;
    background-position: 0 50;
}

</style>
</head>

<body>

<div id="background-container"></div>

</body>
</html>