isValid(): Boolean;
The isValid method of the JadeEditMask class or TextBox class returns true if the text is valid and complete; that is, all required fields of the text have characters in them, as defined by the JadeEditMask class mask property or the TextBox class dataType property (for example, 10/12/2010 versus 10/12).
This method returns false if it is not or if the control is empty.
The following are examples of the isValid method return value.
False, if 21/__/____
False, if __/__/____
True, if 2_/1_/2001 (2 is a valid day and 1 is a valid month)
False, if 0_/10/2001 (0 is not a valid day)
False, if 12/0_/2001 (0 is not a valid month)
True, if 12/10/2001