Hi,
thanks for th e quick answer.
i already use this validation.
But this is not enough :-S
I‘ve created two fields for the Back-end.
field_max_value and field_min_value
In the front-end form i want to use this values for my validation :-)
So i don't validate only integer (value is mm ) i also want to check the range (values from the two other fields) :-)
Thanks