I tried both of your suggestions, and it didn't quite work the way I
need the field to work. I want to limit the field to 5 characters,
hyphen, three characters (zzzzz-zzz), and no more. Currently, even with
your suggested javascript codes, if the user enters more than eight
characters, the input mask changes to zzz,zzz,zzz. I would like to lock
the value so no one can enter more than 8 characters, with the mask
defined in my second sentence.