In a modal window I have a text field using an ajax autocomplete function. My problem is that the select option list is shown behind the modal window. I have tried to change the z-index parameters in the stylesheet file, but it seems that I can only move the select option list in front of the modal transparent background, not the modal window. I am wondering if it is possible to move the select option list in front of the modal window, ie. changing the z-index or other parameters or is there any other changes can I make?