Calendar In Grid Behind Window

I have the professional edition and when you try to open a new dhxwindow and you attach a grid and one of the grid columns is a calendar, the calendar appear behind the window. I tried adjusting the z-index of the calendar but it doesnt seem to work. This is a real issue since I need the grid in the popup window and a column has to be a calendar.




z-index should be more than 50.

We have attached sample of dhxCalendar excell (dhtmlxCalendar z-index is 99 by default). (139 KB)

This works fine in on a page.  What I am talking about is from this page open a dhtmlx modal window with a grid attached and a column being a calendar.  This is where the problem is.