[TYPO3-dev] Backend extension form fields question

[Cray Flatline]

Steffen Kamper wrote:

All three fields are visible. How I can change content of that dropdowns
 depend of parent dropdown?

>> displayCond      string    Contains a condition rule for whether to
>>                            display the field or not.
>>
>>
>> Sorry, but I don't need to show/hide fields, I need to change items in
>> the Make dropdown field dependently of user choise in Type dropdown
>> field, and change items in the Model dropdown field dependently of user
>> choise in Make field.

> exactly, and when you change a field which influences other fields
> having this displayCond, form will be reloaded with the now visible field
> 
> vg Steffen