function imgShift(){
	if (!document.getElementsByTagName) return false;
	var myImg = document.getElementsByTagName("img");
	var totalHeight = document.documentElement.clientHeight;
	halfHeight = (totalHeight / 2) - 92;
	myMargin = halfHeight.toString() + "px";
	myImg[0].style.marginTop = myMargin;
}


addLoadEvent(imgShift);