DOM DIMENSIONS

getElementLeft

function getElementLeft(element) {
	var actualLeft = element.offsetLeft;
	var current = element.offsetParent;

	while (current !== null) {
		actualLeft += current.offsetLeft;
		current = current.offsetParent;
	}

	return actualLeft;
}

getElementTop.js

function getElementTop(element) {
	var actualTop = element.offsetTop;
	var current = element.offsetParent;

	while (current !== null) {
		actualTop += current.offsetTop;
		current = current.offsetParent;
	}

	return actualTop;
}