radios

haii, i am a newbie to drupal 6 i want a help from all of you. I have created a module in which i have a form created using form elements. Now i want is that as i click on one of the radio button i need to generate a form element in my block.pieces of codefunction test_form(){$form['flight'] = array( '#type' => 'tabset',  );$form['flight']['tab1'] = array('#type' => 'tabpage','#title' => t('Domestic'), );