document.documentElement.onscroll = setCoords;

function scrollIt(){
    window.scrollTo(document.forms[0].txtPageX.value, document.forms[0].txtPageY.value);
}

function setCoords(){
	var x;
	var y;
	if (document.documentElement) {
		x = document.documentElement.scrollLeft;
		y = document.documentElement.scrollTop;
	} else {
		x = window.pageXOffset;
		y = window.pageYOffset;
	}
    document.forms[0].txtPageX.value = x;
    document.forms[0].txtPageY.value = y;
}