On both iClassic and iEra, the map opens by pressing the map icon. To close the map, press close. On FaceBook on iClassic (and soon FaceBook iEra), you have shortcuts on the keyboard in addition to hitting the icon; you can open the map by pressing M. However, to get out of it you must manually click close.
When I look at the map on Unholy Nation, you press M to open the map, and M to close it again. This would make things much easier for many people, and I'm sure its a quick script that just needs to be added for convenience. Please?