scrolltop example

<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>
<script type="text/javascript">

alert(document.body); // null

for (var i=1; i<200; i++) {
    document.writeln('<div>'+i+'</div>');
}

alert(document.body); // now: object HTMLBodyElement

$(window).scrollTop(50);

$(document).ready(function(){
    alert(document.body+' ready'); // object HTMLBodyElement
});

</script>
</head>
<body>
</body>
</html>