<html>
<head>
<style type="text/css">
body
{background-color:#FFCC80;
background-image:url(/i/eg_bg_desert.jpg);
background-repeat:no-repeat;
background-attachment:fixed;
}
</style>
<script type="text/javascript">
function changePosition()
{document.body.style.backgroundPositionX="right";
}
</script>
</head>
<body>
<input type="button" onclick="changePosition()" value="Change background-image's x-position" />
<p><b>Note:</b> For this to work in Mozilla, the background-attachment property must be set to "fixed".</p>
</body>
</html>