I need to do something similar to this.
Specifically, I have two combo fields containing the values 4 - 20.
Whatever value is selected in the first field, only values above it should be available in the second field.
And equally, whatever value is selected in the second field, only values below it should be available in the first field.
Thom's solution doesn't really help in this case.
Does anybody have any ideas?
Many Thanks