Here is an example callback function that does the red border
Displaying errors on the "wall"
Here we show the various ways to assigning callback functions for
validator. It is not meant to be simple. It's meant to show you the
different possibilities. All these callback functions print messages
to a DIV with id "info".
The new jQuery Tools book by Alex Libby explores the library in a
precise and structured fashion. If you are getting started on jQuery Tools or
looking for better ways to use the library, this book will be your ally.