specify whole form element

booking.variety_form.inc

@@ -93,6 +93,14 @@ function booking_variety_session_callback($form, &$form_state) {
 
 		//re-create the form element for this timeslot
     $form['variety-sessions'][$fieldname] = array(
+			'#type' => 'select',
+			'#title' => t('Variety Session: ' . $timeslot->booking_variety_time_descrip),
+			'#required' => TRUE,
+			//'#default_value' => '',
+      //'#options' => _booking_get_variety_timeslot_options($timeslot->tid),
+      '#prefix' => '<div id="booking_variety_session_' . $timeslot->tid . 'wrapper">',
+      '#suffix' => '</div>', 
+
       '#options' => array('--'),
       '#default_value' => '--',
       //isset($form_state['values'][$fieldname]) ? $form_state['values'][$fieldname] : '--',