code: public final int getRelativeY() {
  		NativeEvent e = getNativeEvent();
  		Element target = getTarget();
  
  		return e.getClientY() - target.getAbsoluteTop() + target.getScrollTop() +
  				target.getOwnerDocument().getScrollTop();
  	}
docs: Get relative y position on the page.
  @return x position in pixels