top: (
                    pos.top                                                                    // The absolute mouse position
                    + this.offset.relative.top * mod                                        // Only for relative positioned nodes: Relative offset from element to offset parent
                    + this.offset.parent.top * mod                                            // The offsetParent's offset without borders (offset + border)
                    - ($.browser.safari && $.browser.version < 526 && this.cssPosition == 'fixed' ? 0 : (this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : (scrollIsRootNode ? 0 : scroll.scrollTop())) * mod)