<STRONG>REQ_PREV_CHOICE</STRONG> assume that the possible values of a field
form an ordered set, and provide the forms user with a way
to move through the set. The <STRONG>set_fieldtype_choice</STRONG> func-
<STRONG>REQ_PREV_CHOICE</STRONG> assume that the possible values of a field
form an ordered set, and provide the forms user with a way
to move through the set. The <STRONG>set_fieldtype_choice</STRONG> func-