attachURL in background


I have a layout with two cells,
The left cell is a grid with numbers and a toolbar.
If clicked on one of the numbers the rigth cell will be attached to a pdf-file created with this works fine

if clicked on the toolbar a popupwindow opens with info, but it is behind the pdf-file.
Is it possible to view it in front of the pdf-file? See image.



I didn’t looked enough at forum.
Solution was for me in css::
div.dhx_popup_dhx_skyblue div.dhx_popup_area {
z-index: 9999999999;

regards and thanx,