function getScrollYPos(){

var scrollYPos = 0;
if (navigator.appName == "Microsoft Internet Explorer")
{
scrollYPos = document.body.scrollTop;
}
else
{
scrollYPos = window.pageYOffset;
}

return scrollYPos;
}

function f_scrollTop() {
	return f_filterResults (
		window.pageYOffset ? window.pageYOffset : 0,
		document.documentElement ? document.documentElement.scrollTop : 0,
		document.body ? document.body.scrollTop : 0
	);
}
function f_filterResults(n_win, n_docel, n_body) {
	var n_result = n_win ? n_win : 0;
	if (n_docel && (!n_result || (n_result > n_docel)))
		n_result = n_docel;
	return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;
}


function adjustScroller(){
var scrollYPos = f_scrollTop();
var startScrollingAt = 411;
var scroller = document.getElementById("scroller");

var adjustY = 0;
if (scrollYPos > startScrollingAt)
 adjustY = scrollYPos - startScrollingAt;

scroller.style["marginTop"] = adjustY + "px";
}

function startScroller()
{
    setInterval("adjustScroller()", 250);
}