onchangein
Syntax
stat = ONCHANGEIN(tag[occ])
Arguments
stat, occ: integer
tag: database variable
Meaning
Stat will be 1 if tag[occ] has changed since the previous call of ONCHANGEIN. Otherwise, stat will be 0. The occ indicates which iteration of the database field is concerned.
Example
if onchangein(au[1]){
errorm 'Data has changed'
}
Result
If the first occurrence of the field has been changed, display the message Data has changed.