BR-specific Form helpers
A form field that validates input as Brazilian CNPJ.
Input can either be of the format XX.XXX.XXX/XXXX-XX or be a group of 14 digits.
A form field that validates a CPF number or a CPF string. A CPF number is compounded by XXX.XXX.XXX-VD. The two last digits are check digits.
More information: http://en.wikipedia.org/wiki/Cadastro_de_Pessoas_F%C3%ADsicas
A form field that validates input as a Brazilian phone number, with the format XX-XXXX-XXXX.
A choice field that uses a list of Brazilian states as its choices.
An alphabetical list of Brazilian states for use as choices in a formfield