x = screen.width/2 - 345;
y = 100;

function setVisible(obj)
{
	obj = document.getElementById(obj);
	obj.style.visibility = 'hidden';
}
function placeIt(obj)
{
	obj = document.getElementById(obj);
	if (document.documentElement)
	{
		theLeft = document.documentElement.scrollLeft;
		theTop = document.documentElement.scrollTop;
	}
	else if (document.body)
	{
		theLeft = document.body.scrollLeft;
		theTop = document.body.scrollTop;
	}
	theLeft += x;
	theTop += y;
	obj.style.left = theLeft + 'px' ;
	obj.style.top = theTop + 'px' ;
	setTimeout("placeIt('layer1')",500);
}
window.onscroll = setTimeout("placeIt('layer1')",500);