$.Model.validateFormatOf(attrNames, regexp, options) -> undefined
{Array|String}
Attribute name(s) to to validate
{RegExp}
Regular expression used to match for validation
{Object}
(optional) Options for the validations. Valid options include 'message' and 'testIf'.
{undefined}
Validates where the values of specified attributes are of the correct form by matching it against the regular expression provided. See [validation] for more on validations.