function getParentElementByTagName(obj, name){
	while (obj.tagName != name && obj.tagName != "BODY") {
		obj = obj.parentElement;
	}
	return (obj);
}

function getOffsetLeft(obj){
	var myobj = obj;
	var x = 0;
	while (obj) {
		x = x + obj.offsetLeft;
		obj = obj.offsetParent;
	}
	return x;
}

function getOffsetTop(obj){
	var myobj = obj;
	var y = 0;
	while (obj) {
		y = y + obj.offsetTop;
		obj = obj.offsetParent;
	}
	return y;
}