Custom Validaiton Scenarios

[ronnieoverby]

I'm wondering how to add custom validation functions.

My current scenario is this:

I have 2 text inputs inside a single control-group:

• Driver's License State
• Driver's License #

The validation rules are:

State is required only if the # if filled in. State must be 2 characters long.

I'm thinking I need a custom validation function, but I don't see in the documentation how to add it.

I also want these 2 inputs to share a single help-block, because logically it's 1 field, though it has 2 input.

Thanks for the library and your help with this problem!