--- jscalendar.module.cvs	2006-09-17 19:32:02.000000000 +0200
+++ jscalendar.module	2006-10-02 00:07:18.000000000 +0200
@@ -36,14 +36,19 @@
   foreach (element_children($form) as $key) {
     if (isset($form[$key]) && isset($form[$key]['#attributes']) && isset($form[$key]['#attributes']['class']) && !(strpos($form[$key]['#attributes']['class'], 'jscalendar') === FALSE)) {
       jscalendar_load();
-      $settings = array('ifFormat', 'showsTime', 'timeFormat');
+      $settings = array('timestamp', 'ifFormat', 'showsTime', 'timeFormat');
       foreach ($settings as $setting) {
-        if (isset($form[$key]['#jscalendar_' . $setting])) {
+	if (isset($form[$key]['#jscalendar_'.$setting])) {
+	  $form[$key.'_jscalendar']['#tree'] = true;
           $form[$key.'_jscalendar'][$setting] = array(
             '#type' => 'hidden',
-            '#value' => $form[$key]['#jscalendar_' . $setting]
+            '#value' => $form[$key]['#jscalendar_'.$setting],
           );
-          unset($form[$key]['#jscalendar_' . $setting]);
+	  if ($setting != 'timestamp') {
+	    // disable values not necessary in form submit
+	    $form[$key.'_jscalendar'][$setting]['#attributes']['disabled'] = TRUE;
+	  }
+          unset($form[$key]['#jscalendar_'.$setting]);
         }
       }
     }



--- jscalendar.js.cvs	2006-09-17 19:32:02.000000000 +0200
+++ jscalendar.js	2006-10-02 00:11:42.000000000 +0200
@@ -24,10 +24,18 @@
             ifFormat    : settings['ifFormat'],
             button      : input.getAttribute('id') + '-button',
             showsTime   : settings['showsTime'],
-            timeFormat  : settings['timeFormat']
+            timeFormat  : settings['timeFormat'],
+	        timestamp   : $(input.id+'_jscalendar-timestamp'),
+	        onUpdate    : calendarUpdated
           }
         );
       }
     }
   });
 }
+
+function calendarUpdated(cal) {
+  // update timestamp hidden value
+  var timestamp = cal.params.timestamp;
+  if (timestamp) timestamp.value = cal.date.print('%s');
+}