Gets the local CSS X and Y position for the element

@return {Array} [x, y]
function() {
            var me = this,
                offsetParent = me.dom.offsetParent,
                style = me.getStyle(['left', 'top']),
                x = style.left,
                y = style.top;

            if (!x || x === 'auto') {
                x = 0;
            } else if (me.pxRe.test(x)) {
                x = parseFloat(x);
            } else {
                x = me.getX();
                if (offsetParent) {
                    x -= Element.getX(offsetParent);
                }
            }

            if (!y || y === 'auto') {
                y = 0;
            } else if (me.pxRe.test(y)) {
                y = parseFloat(y);
            } else {
                y = me.getY();
                if (offsetParent) {
                    y -= Element.getY(offsetParent);
                }
            }

            return [x, y];
        }