Hiding calculations

[zebrafilm]

On a form we have (public) people filling in details. The input is used to calculated more fields but I need to hide them from (public)view.
It seems to work fine when I add the calculations to a group and set it to SHOW-> Yes but hidden.
The only issue I see is that dropboxes (Databasejoin) that have a default value set, still return NULL .
Anything I can do to make them work and return the default lookup value?

 

[zebrafilm]

Anybody?

 

[OndrejH]

Can you use javascript validation?

Validate value on load - something like this (with your form id as X):

Fabrik.getBlock('form_X').elements.get('table___element').update('yourdefaultvalue');