Dynamic DropDown Lists in Subform

Hi There,

I am facing a problem regarding Dropdown lists in Subform.

I want the top dropdown list values on all bottom left dropdown lists when I press the button.

The bottom left dropdown lists are in the subforms. So When I use java script like this :

data.Daten.Daten.Daten.Data.DropDown.rawValue =  data.Daten.Aktion.DropDown.rawValue;

It does only change first dropdownlist value, not others.

Please provide solution that How can I change all dropdown lists of a Subform dynamically?

Waiting for reply.