force field display and report

[Meyer]

hi there

i have a vat field. varchar 10. i need to have it displayd or saved in mysql as

****/**/**

at the moment the people are entering it as they want, some 1234/1212, or 12343434, or 1234 12 12.

please help

[eitrix]

find out how to validate it with JS when it's entered or after submit.