The available triggers in forms could be rethought. Some issues:

* PRE-FOCUSIN and POST-FOCUSIN are redundant.
* PRE-FOCUSOUT (which is usually used for validation) isn't run on manual field
changes (within trigger code). ON-VALIDATE trigger might be an idea, but maybe
it's bettter to use PRE-CHANGE for validation.
* no trigger available that runs after a detail has been requeried because the
master record pointer has moved.