Data validation logic.
| clearValidation | removes "data incorrect" highlighting from invalid text fields |
| validate | checks data in the form |
| onAfterValidation | fires after data has been validated |
| onBeforeValidate | called before running validation |
| onValidationError | fires when a form input fails to pass validation |
| onValidationSuccess | fires after a form input has passed validation successfully |
| rules | defines a set of rules for input field(s) of the form(htmlform) |