[development] ahah and dropdown list

Dear all, i am developing drupal module with ahah for dropdown index change. when i want to get value from the dropdown list i am not able to get value. please see this code. for normal dropdownlist i am able to get the key of value which is behind the dropdown. *$form_state['values']['master_dropdown']; * But in ahah form, i am using *$form_state['values']['dependent_dropdown_holder']['dependent_dropdown']; * I am able to get the value which is visible in the front of dropdown. i want to get the key value which behind the dropdown so that i will be able to use for the country id etc. please help me. Thank you jayakumar