setfocus

Hi,

I have created post-change trigger on fldA which should set focus on 
that field (it depends of condition)

but focus stay on field where I clicked, for instance fldC. Is it 
possible to do that? I know that works with trigger pre-focusin

on fldB, but what if user will jump somewhere else?

Furthermore, is it possible to insert all null values into detail 
datasource (with proper primary key)?

Regards,

Zvone