codice:
<html>
<head><title>::</title>

<script type="text/javascript">

 function drag(){
    
       document.body.scrollTop = document.body.offsetHeight;

    alert(       document.body.scrollTop +
           '\n'+ document.body.offsetHeight);
       
 }
</script>

</head><body onLoad='drag();'>

<div id="field">
</div>


</body>
</html>