static/ext/src/dom/Element_position.js
function() {
            var me = this,
                offsetParent = me.dom.offsetParent,
                x = me.getStyle('left');

            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);
                }
            }

            return x;
        }
function() {
            var me = this,
                offsetParent = me.dom.offsetParent,
                x = me.getStyle('left');

            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);
                }
            }

            return x;
        }
function ( ) { var me = this , offsetParent = me . dom . offsetParent , x = me . getStyle ( 'left' ) ; 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 ) ; } } return x ; }
Gets the local CSS X position for the element

@return {Number}
Gets the local CSS X position for the element