function getScrollPosY()
{
	if (window.pageYOffset != null)
	{
		return window.pageYOffset;
	}
	else if (document.body.scrollTop != null)
	{
		return document.body.scrollTop;
	}
	
	return 0;
}

function handleScrollEvent()
{
	if (document.all.mov_image != null)
	{
		mov_imgage = document.all.mov_image;
	}
	else if (document.getElementById("mov_image") != null)
	{
		mov_imgage = document.getElementById("mov_image");
	}
	else
	{
		// no object returned - cancel script
		return;
	}
	mov_image.style.top = getScrollPosY() + "px";
}