How do I make sure that the City and State matches in the form?

I'm trying to make sure that people's text matches "City, State" how do I do this?

Input masking is useful for fixed number of inputs. City names surely don't have the same number of characters. You may consider using the following address widgets:

http://widgets.jotform.com/widget/autocompleted_address

http://widgets.jotform.com/widget/address_map_locator

http://widgets.jotform.com/widget/location_coordinates

Please try it and let us know for issues while you are using it.