Contentor CMS

The formproc.php script needs to have server-side form validation - would
be best if CSS could be used to highlight errors

As an example, try adding an event in the past on this (non-Contentor)
page:
http://law.gsu.edu/events/add_event.php

While simplicity insetting up is the main goal, possible required field
types:

- string (length min/max)
- number (value min/max)
- date (range)
- radio button groups (one required)
- checkboxes (make group, require x)

Could also be a dual js and server-side validation, using something like
http://www.phpletter.com/Demo/Ajax-Form-Builder/