var lastX, lastY, currentX, currentY;
function recordbeginvalues() {
	if (document.getElementById&&!document.all) {	// is not IE
		lastY=window.pageYOffset;
		lastX=window.pageXOffset;
		}
	else {											// is IE
		lastY=document.body.scrollTop;
		lastX=document.body.scrollLeft;
		}
	startPolling();
	}

function startPolling() {setInterval("poll()",1);}

function poll(){
	if (document.getElementById&&!document.all) {	// is not IE
		currentY=window.pageYOffset;
		currentX=window.pageXOffset;
		}
	else {											// is IE
		currentY=document.body.scrollTop;
		currentX=document.body.scrollLeft;
		}
	var foot = document.getElementById('footer');
	if (lastX!=currentX || lastY!=currentY) {
		foot.style.top = (foot.offsetHeight + document.getElementsByTagName('body')[0].clientHeight - 50) + (currentY);
		lastX=currentX;
		lastY=currentY;
		}
	}