For more information, see the Remarks section of the Masked Text Box class.
If you are familiar with the characters that the Mask property supports, you can enter it manually.
The masked text box control is an enhanced text box control that supports a declarative syntax for accepting or rejecting user input.
By setting the Mask property, you can specify the allowable user input without writing any custom validation logic in your application.
Since you haven’t told the Form Validation class to validate anything yet, it returns FALSE (boolean false) by default.
You can use any object/method that accepts the field value as its’ first parameter.If you use this approach, you must name your array keys as indicated: Give it a try!Submit your form without the proper data and you’ll see new error messages that correspond to your new rules.To invoke a callback just put the method name in a rule, with “callback_” as the rule prefix.If you need to receive an extra parameter in your callback method, just add it normally after the method name between square brackets, as in: Note You can also process the form data that is passed to your callback and return it.