Calendar pops up behind the middle container

After installing a extension of Aitoc, to reconfigure the checkout-phase, it was made possible to let the customers select a specific pickup-time. However the calender wheere the customer need to select the date, keeps popping up behind the middle container and so it is almost impossible to use. . The calendar is called from a javascript, but I can’t figure out a way, to let it pop-up in front of the container.

Any one a solution?

Regards

Dave Wester

Attachment 12957