Set value of field B changes, when A changes

[ken_s2007]

I have two fields, A & B. When a user changes the value of A (not just enters, and then leaves the value the same, and saves), I want B to have a value set. I've been able to do this as follows. I wanted to check if this is a reasonable approach (given the use of a global variable; I've heard that using local variables is preferable at times, but I have two separate scripts currently), or if there is a better way.

fieldA script trigger "OnObjectEnter" triggers:

Set Variable [$$previousValue; Value:myTable::${fieldA}]

--

fieldA script trigger "OnObjectSave" triggers:

If [$$previousValue ≠ myTable:${fieldA}]

Set Field [myTable::fieldB; "x"}

End if

Ken

[grubber]

Take a look at Mikhail Edoshin's sample here