function setLayers(){
	var obj = document.getElementById('rootTable');
	var tableLeft = 0;
	var tableTop = 0;
	if (obj.offsetParent) {
		tableLeft = obj.offsetLeft;
		tableTop = obj.offsetTop;
		while (obj = obj.offsetParent) {
			tableLeft += obj.offsetLeft;
			tableTop += obj.offsetTop;
		}
	}
	document.getElementById('layer1').style.left = tableLeft+0;
	document.getElementById('layer1').style.top = tableTop+0;
	document.getElementById('layer2').style.left = tableLeft+430;
	document.getElementById('layer2').style.top = tableTop+30;
	document.getElementById('layer3').style.left = tableLeft+780;
	document.getElementById('layer3').style.top = tableTop+0;
}