test replacing whole form

booking.variety_form.inc

@@ -23,6 +23,9 @@ function booking_variety_regn_form($node, &$form_state)
     ->orderBy('v.booking_variety_start');
   $result = $timeslot_query->execute();            
 
+  $form['#prefix'] = '<div id="booking_variety_session_form_wrapper">';
+  $form['#suffix'] = '</div>'; 
+
   $form['identity'] = array(
     '#type' => 'fieldset',
     '#title' => 'Select Person',
@@ -40,8 +43,12 @@ function booking_variety_regn_form($node, &$form_state)
       'event' => 'change',
       //'wrapper' => 'booking_variety_regn_feedback_wrapper',
       //'callback' => 'booking_variety_regn_callback',
-      'wrapper' => 'booking_variety_session_wrapper',
-      'callback' => 'booking_variety_session_callback',
+
+      //'wrapper' => 'booking_variety_session_wrapper',
+      //'callback' => 'booking_variety_session_callback',
+
+      'wrapper' => 'booking_variety_session_form_wrapper',
+      'callback' => 'booking_variety_session_form_callback',
     ),	      
   );
 
@@ -236,6 +243,13 @@ function booking_variety_regn_callback($form, &$form_state) {
 }
 
 
+/**
+ * Callback function 
+ */
+function booking_variety_session_form_callback($form, &$form_state) {
+  return $form;
+}
+
 /**
  * Process the submission 
  */