diff --git a/action/jsinfo.php b/action/jsinfo.php
--- a/action/jsinfo.php
+++ b/action/jsinfo.php
@@ -1,46 +1,50 @@
 <?php
 
 /**
  * DokuWiki DAVCal PlugIn - JSINFO component
  */
  
 if(!defined('DOKU_INC')) die();
 
 class action_plugin_davcal_jsinfo extends DokuWiki_Action_Plugin {
 
     function register(Doku_Event_Handler $controller) {
         $controller->register_hook('DOKUWIKI_STARTED', 'AFTER', $this, 'add_jsinfo_information');
     }
 
     /**
      * Add the language variable to the JSINFO variable
      */
     function add_jsinfo_information(&$event, $param) {
       global $conf;
       global $JSINFO;
       
       $lang = $conf['lang'];
       
-      if(strpos($lang, "de") === 0)
+      switch($lang)
       {
-          $lc = 'de';
-      }
-      else 
-      {
-          $lc = 'en';    
+        case 'de':
+        case 'de-informal':
+            $lc = 'de';
+            break;
+        case 'nl':
+            $lc = 'nl';
+            break;
+        default:
+            $lc = 'en';
       }
       
       $JSINFO['plugin']['davcal']['language'] = $lc;
       if(isset($_SERVER['REMOTE_USER']) && !is_null($_SERVER['REMOTE_USER']))
       {
         $JSINFO['plugin']['davcal']['disable_sync'] = $this->getConf('disable_sync');
         $JSINFO['plugin']['davcal']['disable_settings'] = $this->getConf('hide_settings');
       }
       else
       {
         $JSINFO['plugin']['davcal']['disable_settings'] = 1;
         $JSINFO['plugin']['davcal']['disable_sync'] = 1;
       }
       $JSINFO['plugin']['davcal']['disable_ics'] = $this->getConf('disable_ics');
     }  
 }
diff --git a/lang/de-informal/lang.php b/lang/de-informal/lang.php
new file mode 100644
--- /dev/null
+++ b/lang/de-informal/lang.php
@@ -0,0 +1,50 @@
+<?php
+$lang['created_by_davcal'] = 'Erstellt von DAVCal für DokuWiki';
+$lang['unknown_error'] = 'Unbekannter Fehler';
+$lang['event_added'] = 'Eintrag hinzugefügt';
+$lang['event_edited'] = 'Eintrag bearbeitet';
+$lang['event_deleted'] = 'Eintrag entfernt';
+$lang['no_permission'] = 'Du hast nicht die erforderlichen Rechte, um den Eintrag zu bearbeiten';
+$lang['settings'] = 'Einstellungen/Sync';
+$lang['settings_saved'] = 'Einstellungen erfolgreich gespeichert';
+$lang['error_saving'] = 'Fehler beim Speichern der Einstellungen.';
+$lang['local_time'] = 'Lokale Zeit (Browser-basierend)';
+$lang['from'] = 'Von';
+$lang['to'] = 'Bis';
+$lang['at'] = 'Am';
+$lang['description'] = 'Beschreibung';
+$lang['title'] = 'Titel';
+$lang['js']['create_new_event'] = 'Neuen Eintrag anlegen';
+$lang['js']['cancel'] = 'Abbrechen';
+$lang['js']['create'] = 'Anlegen';
+$lang['js']['save'] = 'Speichern';
+$lang['js']['settings'] = 'Einstellungen';
+$lang['js']['edit'] = 'Bearbeiten';
+$lang['js']['delete'] = 'Löschen';
+$lang['js']['edit_event'] = 'Eintrag bearbeiten';
+$lang['js']['allday'] = 'Ganzer Tag';
+$lang['js']['title'] = 'Titel';
+$lang['js']['from'] = 'Von';
+$lang['js']['to'] = 'Bis';
+$lang['js']['yes'] = 'Ja';
+$lang['js']['confirmation'] = 'Bestätigung';
+$lang['js']['ok'] = 'OK';
+$lang['js']['info'] = 'Info';
+$lang['js']['really_delete_this_event'] = 'Diesen Eintrag wirklich löschen?';
+$lang['js']['timezone'] = 'Zeitzone';
+$lang['js']['weeknumbers'] = 'Wochennummern';
+$lang['js']['use_lang_tz'] = 'Zeitzone der Spracheinstellung verwenden';
+$lang['js']['only_workweek'] = 'Zeige nur die Arbeitswoche';
+$lang['js']['sync_url'] = 'CalDAV URL';
+$lang['js']['error_retrieving_data'] = 'Beim Abfragen der Daten vom Kalenderserver ist ein Fehler aufgetreten.';
+$lang['js']['start_date_invalid'] = 'Beginnzeit/-datum ist ungültig';
+$lang['js']['end_date_invalid'] = 'Endzeit/-datum ist ungültig';
+$lang['js']['end_date_before_start_date'] = 'Endzeit/-datum liegt vor Startzeit/-datum';
+$lang['js']['end_date_is_same_as_start_date'] = 'Endzeit/-datum ist gleich wie Startzeit/-datum';
+$lang['js']['description'] = 'Beschreibung';
+$lang['js']['private_url'] = 'Private URL';
+$lang['js']['recurring_cant_edit'] = 'Das Bearbeiten wiederkehrender Einträge wird derzeit nicht unterstützt';
+$lang['js']['no_permission'] = 'Du hast nicht die erforderlichen Rechte, diesen Kalender zu bearbeiten';
+$lang['js']['calendar'] = 'Kalender';
+$lang['js']['start_monday'] = 'Die Woche beginnt am Montag';
+$lang['js']['nothing_to_show'] = 'Nichts anzuzeigen';
diff --git a/lang/de-informal/settings.php b/lang/de-informal/settings.php
new file mode 100644
--- /dev/null
+++ b/lang/de-informal/settings.php
@@ -0,0 +1,9 @@
+<?php
+
+$lang['hide_settings'] = 'Verstecke den Knopf Einstellungen unterhalb des Kalenders';
+$lang['disable_sync'] = 'Deaktiviere CalDAV Synchronisation (aber erlaube Private URL)';
+$lang['disable_ics'] = 'Deaktiviere Private URL Synchronisation (aber erlaube CalDAV Synchronisierung)';
+$lang['monday'] = 'Wochenbeginn ist am Montag statt am Sonntag';
+$lang['timezone'] = 'Setze die Zeitzone des Kalenders (zB "Europe/Vienna" oder "local" für Browser-basierende Zeit)';
+$lang['workweek'] = 'Zeige nur die Arbeitswoche';
+$lang['weeknumbers'] = 'Zeige Wochennummern';
diff --git a/lang/de/lang.php b/lang/de/lang.php
--- a/lang/de/lang.php
+++ b/lang/de/lang.php
@@ -1,1 +1,50 @@
 <?php
+$lang['created_by_davcal'] = 'Erstellt von DAVCal für DokuWiki';
+$lang['unknown_error'] = 'Unbekannter Fehler';
+$lang['event_added'] = 'Eintrag hinzugefügt';
+$lang['event_edited'] = 'Eintrag bearbeitet';
+$lang['event_deleted'] = 'Eintrag entfernt';
+$lang['no_permission'] = 'Sie haben nicht die erforderlichen Rechte, um den Eintrag zu bearbeiten';
+$lang['settings'] = 'Einstellungen/Sync';
+$lang['settings_saved'] = 'Einstellungen erfolgreich gespeichert';
+$lang['error_saving'] = 'Fehler beim Speichern der Einstellungen.';
+$lang['local_time'] = 'Lokale Zeit (Browser-basierend)';
+$lang['from'] = 'Von';
+$lang['to'] = 'Bis';
+$lang['at'] = 'Am';
+$lang['description'] = 'Beschreibung';
+$lang['title'] = 'Titel';
+$lang['js']['create_new_event'] = 'Neuen Eintrag anlegen';
+$lang['js']['cancel'] = 'Abbrechen';
+$lang['js']['create'] = 'Anlegen';
+$lang['js']['save'] = 'Speichern';
+$lang['js']['settings'] = 'Einstellungen';
+$lang['js']['edit'] = 'Bearbeiten';
+$lang['js']['delete'] = 'Löschen';
+$lang['js']['edit_event'] = 'Eintrag bearbeiten';
+$lang['js']['allday'] = 'Ganzer Tag';
+$lang['js']['title'] = 'Titel';
+$lang['js']['from'] = 'Von';
+$lang['js']['to'] = 'Bis';
+$lang['js']['yes'] = 'Ja';
+$lang['js']['confirmation'] = 'Bestätigung';
+$lang['js']['ok'] = 'OK';
+$lang['js']['info'] = 'Info';
+$lang['js']['really_delete_this_event'] = 'Diesen Eintrag wirklich löschen?';
+$lang['js']['timezone'] = 'Zeitzone';
+$lang['js']['weeknumbers'] = 'Wochennummern';
+$lang['js']['use_lang_tz'] = 'Zeitzone der Spracheinstellung verwenden';
+$lang['js']['only_workweek'] = 'Zeige nur die Arbeitswoche';
+$lang['js']['sync_url'] = 'CalDAV URL';
+$lang['js']['error_retrieving_data'] = 'Beim Abfragen der Daten vom Kalenderserver ist ein Fehler aufgetreten.';
+$lang['js']['start_date_invalid'] = 'Beginnzeit/-datum ist ungültig';
+$lang['js']['end_date_invalid'] = 'Endzeit/-datum ist ungültig';
+$lang['js']['end_date_before_start_date'] = 'Endzeit/-datum liegt vor Startzeit/-datum';
+$lang['js']['end_date_is_same_as_start_date'] = 'Endzeit/-datum ist gleich wie Startzeit/-datum';
+$lang['js']['description'] = 'Beschreibung';
+$lang['js']['private_url'] = 'Private URL';
+$lang['js']['recurring_cant_edit'] = 'Das Bearbeiten wiederkehrender Einträge wird derzeit nicht unterstützt';
+$lang['js']['no_permission'] = 'Sie haben nicht die erforderlichen Rechte, diesen Kalender zu bearbeiten';
+$lang['js']['calendar'] = 'Kalender';
+$lang['js']['start_monday'] = 'Die Woche beginnt am Montag';
+$lang['js']['nothing_to_show'] = 'Nichts anzuzeigen';
diff --git a/lang/de/settings.php b/lang/de/settings.php
new file mode 100644
--- /dev/null
+++ b/lang/de/settings.php
@@ -0,0 +1,9 @@
+<?php
+
+$lang['hide_settings'] = 'Verstecke den Knopf Einstellungen unterhalb des Kalenders';
+$lang['disable_sync'] = 'Deaktiviere CalDAV Synchronisation (aber erlaube Private URL)';
+$lang['disable_ics'] = 'Deaktiviere Private URL Synchronisation (aber erlaube CalDAV Synchronisierung)';
+$lang['monday'] = 'Wochenbeginn ist am Montag statt am Sonntag';
+$lang['timezone'] = 'Setze die Zeitzone des Kalenders (zB "Europe/Vienna" oder "local" für Browser-basierende Zeit)';
+$lang['workweek'] = 'Zeige nur die Arbeitswoche';
+$lang['weeknumbers'] = 'Zeige Wochennummern';
diff --git a/lang/nl/lang.php b/lang/nl/lang.php
new file mode 100644
--- /dev/null
+++ b/lang/nl/lang.php
@@ -0,0 +1,50 @@
+<?php
+$lang['created_by_davcal'] = 'Gemaakt door DAVCal for DokuWiki';
+$lang['unknown_error'] = 'Onbekende fout';
+$lang['event_added'] = 'Gebeurtenis toegevoegd';
+$lang['event_edited'] = 'Gebeurtenis gewijzigd';
+$lang['event_deleted'] = 'Gebeurtenis verwijderd';
+$lang['no_permission'] = 'U heeft onvoldoende rechten om deze kalender te wijzigen';
+$lang['settings'] = 'Instellingen/Sync';
+$lang['settings_saved'] = 'Instellingen opgeslagen';
+$lang['error_saving'] = 'Fout tijdens opslaan instellingen.';
+$lang['local_time'] = 'Lokale tijd (van browser)';
+$lang['from'] = 'Van';
+$lang['to'] = 'Tot';
+$lang['at'] = 'Op';
+$lang['description'] = 'Omschrijving';
+$lang['title'] = 'Titel';
+$lang['js']['create_new_event'] = 'Nieuwe Gebeurtenis';
+$lang['js']['cancel'] = 'Annuleer';
+$lang['js']['create'] = 'Nieuw';
+$lang['js']['save'] = 'Opslaan';
+$lang['js']['settings'] = 'Instellingen';
+$lang['js']['edit'] = 'Wijzig';
+$lang['js']['delete'] = 'Verwijder';
+$lang['js']['edit_event'] = 'Wijzig Gebeurtenis';
+$lang['js']['allday'] = 'Hele dag Gebeurtenis';
+$lang['js']['title'] = 'Titel';
+$lang['js']['from'] = 'Van';
+$lang['js']['to'] = 'Tot';
+$lang['js']['yes'] = 'Ja';
+$lang['js']['confirmation'] = 'Bevestiging';
+$lang['js']['ok'] = 'OK';
+$lang['js']['info'] = 'Info';
+$lang['js']['really_delete_this_event'] = 'Deze gebeurtenis echt verwijderen?';
+$lang['js']['timezone'] = 'Tijdzone';
+$lang['js']['weeknumbers'] = 'Week Nummers';
+$lang['js']['use_lang_tz'] = 'Zelfde Tijdzone zoals ingestelde taal';
+$lang['js']['only_workweek'] = 'Toon alleen werkdagen';
+$lang['js']['sync_url'] = 'CalDAV URL';
+$lang['js']['error_retrieving_data'] = 'Er is een fout opgetreden bij het ophalen van de gegevens van de kalender server.';
+$lang['js']['start_date_invalid'] = 'Start datum/tijd is ongeldig.';
+$lang['js']['end_date_invalid'] = 'Eind datum/tijd is ongeldig.';
+$lang['js']['end_date_before_start_date'] = 'Eind datum/tijd is voor start datum/tijd.';
+$lang['js']['end_date_is_same_as_start_date'] = 'Eind datum/tijd is gelijk aan start datum/tijd.';
+$lang['js']['description'] = 'Omschrijving';
+$lang['js']['private_url'] = 'Prive URL';
+$lang['js']['recurring_cant_edit'] = 'Wijzigen van herhalende gebeurtenissen wordt niet ondersteund';
+$lang['js']['no_permission'] = 'U heeft onvoldoende rechten om deze kalender te wijzigen';
+$lang['js']['calendar'] = 'Kalender';
+$lang['js']['start_monday'] = 'Week start op Maandag';
+$lang['js']['nothing_to_show'] = 'Niets weer te geven';
diff --git a/script.js b/script.js
--- a/script.js
+++ b/script.js
@@ -1,706 +1,707 @@
 /* DOKUWIKI:include_once fullcalendar-2.4.0/moment.js */
 /* DOKUWIKI:include_once fullcalendar-2.4.0/fullcalendar.js */
 /* DOKUWIKI:include_once fullcalendar-2.4.0/lang/de.js */
 /* DOKUWIKI:include_once fullcalendar-2.4.0/lang/en.js */
+/* DOKUWIKI:include_once fullcalendar-2.4.0/lang/nl.js */
 /* DOKUWIKI:include_once datetimepicker-2.4.5/jquery.datetimepicker.js */
 /* DOKUWIKI:include_once jstz.js */
 
 /**
  * Initialize the DAVCal script, attaching some event handlers and triggering
  * the initial load of the fullcalendar JS
  */
 jQuery(function() {
     // Redefine functions for using moment.js with datetimepicker
     
     Date.parseDate = function( input, format ){
       return moment(input,format).toDate();
     };
     Date.prototype.dateFormat = function( format ){
       return moment(this).format(format);
     };
     
     // Attach to event links
     var calendarpage = jQuery('#fullCalendar').data('calendarpage');
     if(!calendarpage) return;
     dw_davcal__modals.page = calendarpage;
     
     jQuery('div.fullCalendarSettings a').each(function() {
         var $link = jQuery(this);
         var href = $link.attr('href');
         if (!href) return;
 
         $link.click(
             function(e) {
                 dw_davcal__modals.showSettingsDialog();
                 e.preventDefault();
                 return '';
             }
         );
         }
     );
     
     // First, retrieve the current settings.
     // Upon success, initialize fullcalendar.
     var postArray = { };
     jQuery.post(
         DOKU_BASE + 'lib/exe/ajax.php',
         {
             call: 'plugin_davcal',
             id: dw_davcal__modals.page,
             page: dw_davcal__modals.page,
             action: 'getSettings',
             params: postArray
         },
         function(data)
         {
             var result = data['result'];
             if(result === true)
             {
                 dw_davcal__modals.settings = data['settings'];
                 var wknum = false;
                 var tz = false;
                 var we = true;
                 var ro = false;
                 var firstday = 0;
                 var detectedTz = jstz.determine().name();
                 dw_davcal__modals.detectedTz = detectedTz;
                 if(data['settings']['weeknumbers'] == 1)
                     wknum = true;
                 if(data['settings']['timezone'] !== '')
                     tz = data['settings']['timezone'];
                 if(data['settings']['workweek'] == 1)
                     we = false;
                 if(data['settings']['monday'] == 1)
                     firstday = 1;
                 var defaultView = data['settings']['meta']['view'];
                 // Initialize the davcal popup
                 var res = jQuery('#fullCalendar').fullCalendar({
                     dayClick: function(date, jsEvent, view) {
                         dw_davcal__modals.showEditEventDialog(date, false);
                     },
                     eventClick: function(calEvent, jsEvent, view) {
                         dw_davcal__modals.showEditEventDialog(calEvent, true);
                     },
                     events: {
                         url: DOKU_BASE + 'lib/exe/ajax.php',
                         type: 'POST',
                         data: {
                             call: 'plugin_davcal',
                             action: 'getEvents',
                             id: dw_davcal__modals.page,
                             page: dw_davcal__modals.page
                         },
                         error: function() {
                             dw_davcal__modals.msg = LANG.plugins.davcal['error_retrieving_data'];
                             dw_davcal__modals.showDialog(false);
                         }
                     },
                     header: {
                         left: 'title',
                         center: 'today prev,next',
                         right: 'month,agendaWeek,agendaDay'
                     },
                     lang: JSINFO.plugin.davcal['language'],
                     weekNumbers: wknum,
                     timezone: tz,
                     weekends: we,
                     firstDay: firstday,
                     defaultView: defaultView
                 });
             }
         }
     );    
 });
 
 /**
  * This holds all modal windows that DAVCal uses.
  */
 var dw_davcal__modals = {
     $editEventDialog: null,
     $dialog: null,
     $settingsDialog: null,
     msg: null,
     completeCb: null,
     action: null,
     uid: null,
     settings: null,
     page: null,
     detectedTz: null,
     
     /**
      * Show the settings dialog
      */
     // FIXME: Hide URLs for multi-calendar
     showSettingsDialog : function() {
         if(dw_davcal__modals.$settingsDialog)
             return;
 
         // Dialog buttons are language-dependent and defined here.
         // Attach event handlers for save and cancel.
         var dialogButtons = {};
         if(!JSINFO.plugin.davcal['disable_settings'])
         {
             dialogButtons[LANG.plugins.davcal['save']] = function() {
                 var postArray = { };
                 jQuery("input[class=dw_davcal__settings], select[class=dw_davcal__settings]").each(function() {
                   if(jQuery(this).attr('type') == 'checkbox')
                   {
                       postArray[jQuery(this).prop('name')] = jQuery(this).prop('checked') ? 1 : 0;
                   }
                   else
                   {
                       postArray[jQuery(this).prop('name')] = jQuery(this).val();
                   }
                 });
                 jQuery('#dw_davcal__ajaxsettings').html('<img src="'+DOKU_BASE+'lib/images/throbber.gif" alt="" width="16" height="16" />');
                 jQuery.post(
                     DOKU_BASE + 'lib/exe/ajax.php',
                     {
                         call: 'plugin_davcal',
                         id: dw_davcal__modals.page,
                         page: dw_davcal__modals.page,
                         action: 'saveSettings',
                         params: postArray
                     },
                     function(data)
                     {
                         var result = data['result'];
                         var html = data['html'];
                         jQuery('#dw_davcal__ajaxsettings').html(html);
                         if(result === true)
                         {
                             location.reload();
                         }
                     }
                 );
             };
         }
         dialogButtons[LANG.plugins.davcal['cancel']] = function () {
             dw_davcal__modals.hideSettingsDialog();
         };
         
         var settingsHtml = '<div><table>';
         
         if(JSINFO.plugin.davcal['disable_settings'] && JSINFO.plugin.davcal['disable_sync'] && JSINFO.plugin.davcal['disable_ics'])
         {
             settingsHtml += LANG.plugins.davcal['nothing_to_show'];
         }
         
         if(!JSINFO.plugin.davcal['disable_settings'])
         {
             settingsHtml += '<tr><td>' + LANG.plugins.davcal['timezone'] + '</td><td><select name="timezone" id="dw_davcal__settings_timezone" class="dw_davcal__settings"></select></td></tr>' +
             '<tr><td>' + LANG.plugins.davcal['weeknumbers'] + '</td><td><input type="checkbox" name="weeknumbers" id="dw_davcal__settings_weeknumbers" class="dw_davcal__settings"></td></tr>' +
             '<tr><td>' + LANG.plugins.davcal['only_workweek'] + '</td><td><input type="checkbox" name="workweek" id="dw_davcal__settings_workweek" class="dw_davcal__settings"></td></tr>' +
             '<tr><td>' + LANG.plugins.davcal['start_monday'] + '</td><td><input type="checkbox" name="monday" id="dw_davcal__settings_monday" class="dw_davcal__settings"></td></tr>';
          }
          
          if(!JSINFO.plugin.davcal['disable_sync'])
          {
              settingsHtml += '<tr id="dw_davcal__settings_syncurl"><td>' + LANG.plugins.davcal['sync_url'] + '</td><td><input type="text" name="syncurl" readonly="readonly" id="dw_davcal__settings_syncurl" class="dw_davcal__text" value="' + dw_davcal__modals.settings['syncurl'] + '"></td></tr>';
          }
          
          if(!JSINFO.plugin.davcal['disable_ics'])
          {
              settingsHtml += '<tr id="dw_davcal__settings_privateurl"><td>' + LANG.plugins.davcal['private_url'] + '</td><td><input type="text" name="privateurl" readonly="readonly" id="dw_davcal__settings_privateurl" class="dw_davcal__text" value="' + dw_davcal__modals.settings['privateurl'] + '"></td></tr>';
          }
          
          settingsHtml += '</table>' +
             '</div>' +
             '<div id="dw_davcal__ajaxsettings"></div>';
         
         dw_davcal__modals.$settingsDialog = jQuery(document.createElement('div'))
        .dialog({
            autoOpen: false,
            draggable: true,
            title: LANG.plugins.davcal['settings'],
            resizable: true,         
            buttons: dialogButtons,
        })
        .html(
            settingsHtml
             )
        .parent()
        .attr('id','dw_davcal__settings')
        .show()
        .appendTo('.dokuwiki:first');
        
        jQuery('#dw_davcal__settings').position({
            my: "center",
            at: "center",
            of: window
        });
        
        // Initialize current settings
         
         if(!JSINFO.plugin.davcal['disable_settings'])
         {
             var $tzdropdown = jQuery('#dw_davcal__settings_timezone');
             jQuery('#fullCalendarTimezoneList option').each(function() {
                 jQuery('<option />', {value: jQuery(this).val(), 
                         text: jQuery(this).text()}).appendTo($tzdropdown);
             });
             
             if(dw_davcal__modals.settings)
             {
                 if(dw_davcal__modals.settings['timezone'] !== '')
                     jQuery('#dw_davcal__settings_timezone').val(dw_davcal__modals.settings['timezone']);
                 if(dw_davcal__modals.settings['weeknumbers'] == 1)
                     jQuery('#dw_davcal__settings_weeknumbers').prop('checked', true);
                 else
                     jQuery('#dw_davcal__settings_weeknumbers').prop('checked', false);
                     
                 if(dw_davcal__modals.settings['workweek'] == 1)
                     jQuery('#dw_davcal__settings_workweek').prop('checked', true);
                 else
                     jQuery('#dw_davcal__settings_workweek').prop('checked', false);
                     
                 if(dw_davcal__modals.settings['monday'] == 1)
                     jQuery('#dw_davcal__settings_monday').prop('checked', true);
                 else
                     jQuery('#dw_davcal__settings_monday').prop('checked', false);
             }
         }
 
         // attach event handlers
         jQuery('#dw_davcal__settings .ui-dialog-titlebar-close').click(function(){
           dw_davcal__modals.hideSettingsDialog();
         });
     },
     
     /**
      * Sanity-check our events.
      * 
      * @return boolean false on failure, otherwise true
      */
     checkEvents : function() {
         // Retrieve dates
         var allDay = jQuery('#dw_davcal__allday_edit').prop('checked');
         var startDate = moment(jQuery('#dw_davcal__eventfrom_edit').val(), 'YYYY-MM-DD');
         var endDate = moment(jQuery('#dw_davcal__eventto_edit').val(), 'YYYY-MM-DD');
         
         // Do the checking
         if(!allDay)
         {
             var startTime = moment.duration(jQuery('#dw_davcal__eventfromtime_edit').val());
             var endTime = moment.duration(jQuery('#dw_davcal__eventtotime_edit').val());
             startDate.add(startTime);
             endDate.add(endTime);
         }
         if(!startDate.isValid())
         {
             dw_davcal__modals.msg = LANG.plugins.davcal['start_date_invalid'];
             dw_davcal__modals.showDialog(false);
             return false;
         }
         if(!endDate.isValid())
         {
             dw_davcal__modals.msg = LANG.plugins.davcal['end_date_invalid'];
             dw_davcal__modals.showDialog(false);
             return false;
         }
         if(endDate.isBefore(startDate))
         {
             dw_davcal__modals.msg = LANG.plugins.davcal['end_date_before_start_date'];
             dw_davcal__modals.showDialog(false);
             return false;
         }
         if(!allDay && endDate.isSame(startDate))
         {
             dw_davcal__modals.msg = LANG.plugins.davcal['end_date_is_same_as_start_date'];
             dw_davcal__modals.showDialog(false);
             return false;
         }
         return true;
     },
     
     /**
      * Show the edit event dialog, which is also used to create new events
      * @param {Object} event The event to create, that is the date or the calEvent
      * @param {Object} edit  Whether we edit (true) or create a new event (false)
      */
     showEditEventDialog : function(event, edit) {
         if(dw_davcal__modals.$editEventDialog)
             return;
         
         var readonly = dw_davcal__modals.settings['readonly'];
         var title = '';   
         var dialogButtons = {};
         var calEvent = [];
         var recurringWarning = '';
         // Buttons are dependent on edit or create
         // Several possibilities:
         //
         // 1) Somebody tries to edit, it is not recurring and not readonly -> show
         // 2) Somebody tries to edit, it is recurring and not readonly -> message
         // 3) Somebody tries to edit, it is readonly -> message
         // 4) Somebody tries to create and it is readonly -> message
         // 5) Somebody tries to create -> show
         if(edit && (event.recurring != true) && (readonly === false))
         {
             calEvent = event;
             title = LANG.plugins.davcal['edit_event'];
             dialogButtons[LANG.plugins.davcal['edit']] = function() {
                 if(!dw_davcal__modals.checkEvents())
                   return;
                 var postArray = { };
                 var pageid = dw_davcal__modals.page;
                 if(dw_davcal__modals.settings['multi'])
                 {
                     pageid = jQuery("#dw_davcal__editevent_calendar option:selected").val();
                 }
                 jQuery("input.dw_davcal__editevent, textarea.dw_davcal__editevent").each(function() {
                   if(jQuery(this).attr('type') == 'checkbox')
                   {
                       postArray[jQuery(this).prop('name')] = jQuery(this).prop('checked') ? 1 : 0;
                   }
                   else
                   {
                       postArray[jQuery(this).prop('name')] = jQuery(this).val();
                   }
                 });
                 jQuery('#dw_davcal__ajaxedit').html('<img src="'+DOKU_BASE+'lib/images/throbber.gif" alt="" width="16" height="16" />');
                 jQuery.post(
                     DOKU_BASE + 'lib/exe/ajax.php',
                     {
                         call: 'plugin_davcal',
                         id: pageid,
                         page: dw_davcal__modals.page,
                         action: 'editEvent',
                         params: postArray
                     },
                     function(data)
                     {
                         var result = data['result'];
                         var html = data['html'];
                         jQuery('#dw_davcal__ajaxedit').html(html);
                         if(result === true)
                         {
                             jQuery('#fullCalendar').fullCalendar('refetchEvents');
                             dw_davcal__modals.hideEditEventDialog();
                         }
                     }
                 );
             };
             dialogButtons[LANG.plugins.davcal['delete']] = function() {
                 dw_davcal__modals.action = 'deleteEvent';
                 dw_davcal__modals.msg = LANG.plugins.davcal['really_delete_this_event'];
                 dw_davcal__modals.completeCb = function(data) {
                     var result = data['result'];
                     var html = data['html'];
                     jQuery('#dw_davcal__ajaxedit').html(html);                    
                     if(result === true)
                     {
                         jQuery('#fullCalendar').fullCalendar('refetchEvents');
                         dw_davcal__modals.hideEditEventDialog();
                     }
                 };
                 dw_davcal__modals.showDialog(true);
             };
         }
         else if(edit && (event.recurring == true) && (readonly === false))
         {
             calEvent = event;
             title = LANG.plugins.davcal['edit_event'];
             recurringWarning = LANG.plugins.davcal['recurring_cant_edit'];
         }
         else if(edit && (readonly === true))
         {
             calEvent = event;
             title = LANG.plugins.davcal['edit_event'];
             recurringWarning = LANG.plugins.davcal['no_permission'];
         }
         else if(readonly === true)
         {
             calEvent.start = event;
             calEvent.end = moment(event);
             calEvent.start.hour(12);
             calEvent.start.minute(0);
             calEvent.end.hour(13);
             calEvent.end.minute(0);
             calEvent.allDay = false;
             calEvent.recurring = false;
             calEvent.title = '';
             calEvent.description = '';
             calEvent.id = '0';
             calEvent.page = dw_davcal__modals.page;
             title = LANG.plugins.davcal['create_new_event'];
             recurringWarning = LANG.plugins.davcal['no_permission'];
         }
         else
         {
             calEvent.start = event;
             calEvent.end = moment(event);
             calEvent.start.hour(12);
             calEvent.start.minute(0);
             calEvent.end.hour(13);
             calEvent.end.minute(0);
             calEvent.allDay = false;
             calEvent.recurring = false;
             calEvent.title = '';
             calEvent.description = '';
             calEvent.id = '0';
             calEvent.page = dw_davcal__modals.settings['calids'][0]['page'];
             title = LANG.plugins.davcal['create_new_event'];
             dialogButtons[LANG.plugins.davcal['create']] = function() {
                 if(!dw_davcal__modals.checkEvents())
                   return;
 
                 var postArray = { };
                 var pageid = dw_davcal__modals.page;
                 if(dw_davcal__modals.settings['multi'])
                 {
                     pageid = jQuery("#dw_davcal__editevent_calendar option:selected").val();
                 }
                 jQuery("input.dw_davcal__editevent, textarea.dw_davcal__editevent").each(function() {
                   if(jQuery(this).attr('type') == 'checkbox')
                   {
                       postArray[jQuery(this).prop('name')] = jQuery(this).prop('checked') ? 1 : 0;
                   }
                   else
                   {
                       postArray[jQuery(this).prop('name')] = jQuery(this).val();
                   }
                 });
                 jQuery('#dw_davcal__ajaxedit').html('<img src="'+DOKU_BASE+'lib/images/throbber.gif" alt="" width="16" height="16" />');
                 jQuery.post(
                     DOKU_BASE + 'lib/exe/ajax.php',
                     {
                         call: 'plugin_davcal',
                         id: pageid,
                         page: dw_davcal__modals.page,
                         action: 'newEvent',
                         params: postArray
                     },
                     function(data)
                     {
                         var result = data['result'];
                         var html = data['html'];
                         jQuery('#dw_davcal__ajaxedit').html(html);
                         if(result === true)
                         {
                             jQuery('#fullCalendar').fullCalendar('refetchEvents');
                             dw_davcal__modals.hideEditEventDialog();
                         }
                     }
                 );
             };
         }
         dialogButtons[LANG.plugins.davcal['cancel']] = function() {
             dw_davcal__modals.hideEditEventDialog();
         };
         dw_davcal__modals.uid = calEvent.id;
         dw_davcal__modals.$editEventDialog = jQuery(document.createElement('div'))
        .dialog({
            autoOpen: false,
            draggable: true,
            title: title,
            resizable: true,         
            buttons: dialogButtons,
        })
        .html(
             '<div><table>' + 
             '<tr><td>' + LANG.plugins.davcal['calendar'] + '</td><td><select id="dw_davcal__editevent_calendar"></select></td></tr>' +
             '<tr><td>' + LANG.plugins.davcal['title'] + '</td><td><input type="text" id="dw_davcal__eventname_edit" name="eventname" class="dw_davcal__editevent"></td></tr>' +
             '<tr><td>' + LANG.plugins.davcal['description'] + '</td><td><textarea name="eventdescription" id="dw_davcal__eventdescription_edit" class="dw_davcal__editevent dw_davcal__text"></textarea></td></tr>' +
             '<tr><td>' + LANG.plugins.davcal['from'] + '</td><td><input type="text" name="eventfrom" id="dw_davcal__eventfrom_edit" class="dw_davcal__editevent dw_davcal__date"><input type="text" name="eventfromtime" id="dw_davcal__eventfromtime_edit" class="dw_davcal__editevent dw_davcal__time"></td></tr>' +
             '<tr><td>' + LANG.plugins.davcal['to'] + '</td><td><input type="text" name="eventto" id="dw_davcal__eventto_edit" class="dw_davcal__editevent dw_davcal__date"><input type="text" name="eventtotime" id="dw_davcal__eventtotime_edit" class="dw_davcal__editevent dw_davcal__time"></td></tr>' +
             '<tr><td colspan="2"><input type="checkbox" name="allday" id="dw_davcal__allday_edit" class="dw_davcal__editevent">' + LANG.plugins.davcal['allday'] + '</td></tr>' +
             '</table>' +
             recurringWarning + 
             '<input type="hidden" name="uid" id="dw_davcal__uid_edit" class="dw_davcal__editevent">' +
             '<input type="hidden" name="detectedtz" id="dw_davcal__tz_edit" class="dw_davcal__editevent">' +
             '</div>' +
             '<div id="dw_davcal__ajaxedit"></div>'
             )
        .parent()
        .attr('id','dw_davcal__edit')
        .show()
        .appendTo('.dokuwiki:first');
        
        jQuery('#dw_davcal__edit').position({
            my: "center",
            at: "center",
            of: window
        });
        
        // Populate calendar dropdown
        var $dropdown = jQuery("#dw_davcal__editevent_calendar");
        for(var i=0; i<dw_davcal__modals.settings['calids'].length; i++)
        {
            var sel = '';
            if(calEvent.page == dw_davcal__modals.settings['calids'][i]['page'])
              sel = ' selected="selected"';
            $dropdown.append('<option value="' + dw_davcal__modals.settings['calids'][i]['page'] + '"' + sel + '>' + dw_davcal__modals.settings['calids'][i]['name'] + '</option>');
        }
        if(edit || (dw_davcal__modals.settings['calids'].length < 1))
        {
            $dropdown.prop('disabled', true);
        }
        
        // Set up existing/predefined values
        jQuery('#dw_davcal__tz_edit').val(dw_davcal__modals.detectedTz);
        jQuery('#dw_davcal__uid_edit').val(calEvent.id);
        jQuery('#dw_davcal__eventname_edit').val(calEvent.title);
        jQuery('#dw_davcal__eventfrom_edit').val(calEvent.start.format('YYYY-MM-DD'));
        jQuery('#dw_davcal__eventfromtime_edit').val(calEvent.start.format('HH:mm'));
        jQuery('#dw_davcal__eventdescription_edit').val(calEvent.description);
        if(calEvent.allDay && (calEvent.end === null))
        {
            jQuery('#dw_davcal__eventto_edit').val(calEvent.start.format('YYYY-MM-DD'));
            jQuery('#dw_davcal__eventtotime_edit').val(calEvent.start.format('HH:mm'));
        }
        else if(calEvent.allDay)
        {
            endEvent = moment(calEvent.end);
            endEvent.subtract(1, 'days');
            jQuery('#dw_davcal__eventto_edit').val(endEvent.format('YYYY-MM-DD'));
            jQuery('#dw_davcal__eventotime_edit').val(endEvent.format('HH:mm'));
        }
        else
        {
            jQuery('#dw_davcal__eventto_edit').val(calEvent.end.format('YYYY-MM-DD'));
            jQuery('#dw_davcal__eventtotime_edit').val(calEvent.end.format('HH:mm'));
        }
        jQuery('#dw_davcal__allday_edit').prop('checked', calEvent.allDay);
        
         // attach event handlers
         jQuery('#dw_davcal__edit .ui-dialog-titlebar-close').click(function(){
           dw_davcal__modals.hideEditEventDialog();
         });
         jQuery('#dw_davcal__eventfrom_edit').datetimepicker({format:'YYYY-MM-DD',
                                                       formatDate:'YYYY-MM-DD',
                                                       datepicker: true,
                                                       timepicker: false,
                                                       });
         jQuery('#dw_davcal__eventfromtime_edit').datetimepicker({format:'HH:mm',
                                                       formatTime:'HH:mm',
                                                       datepicker: false,
                                                       timepicker: true,
                                                       step: 15});
         jQuery('#dw_davcal__eventto_edit').datetimepicker({format:'YYYY-MM-DD',
                                                       formatDate:'YYYY-MM-DD',
                                                       datepicker: true,
                                                       timepicker: false,
                                                       });
         jQuery('#dw_davcal__eventtotime_edit').datetimepicker({format:'HH:mm',
                                                       formatTime:'HH:mm',
                                                       datepicker: false,
                                                       timepicker: true,
                                                       step:15});
         jQuery('#dw_davcal__allday_edit').change(function() {
             if(jQuery(this).is(":checked"))
             {
                 jQuery('#dw_davcal__eventfromtime_edit').prop('readonly', true);
                 jQuery('#dw_davcal__eventtotime_edit').prop('readonly', true);
             }
             else
             {
                 jQuery('#dw_davcal__eventfromtime_edit').prop('readonly', false);
                 jQuery('#dw_davcal__eventtotime_edit').prop('readonly', false);
             }
         });
         jQuery('#dw_davcal__allday_edit').change();
     },
     
     /**
      * Show an info/confirmation dialog
      * @param {Object} confirm Whether a confirmation dialog (true) or an info dialog (false) is requested
      */
     showDialog : function(confirm)
     {
         if(dw_davcal__modals.$confirmDialog)
             return;
         var dialogButtons = {};
         var title = '';
         if(confirm)
         {
             title = LANG.plugins.davcal['confirmation'];
             var pageid = dw_davcal__modals.page;
             if(dw_davcal__modals.settings['multi'])
             {
                 pageid = jQuery("#dw_davcal__editevent_calendar option:selected").val();
             }
             dialogButtons[LANG.plugins.davcal['yes']] =  function() {
                             jQuery.post(
                                 DOKU_BASE + 'lib/exe/ajax.php',
                                 {
                                     call: 'plugin_davcal',
                                     id: pageid,
                                     page: dw_davcal__modals.page,
                                     action: dw_davcal__modals.action,
                                     params: {
                                         uid: dw_davcal__modals.uid
                                     }
                                 },
                                 function(data)
                                 {
                                     dw_davcal__modals.completeCb(data);
                                 }
                             );
                             dw_davcal__modals.hideDialog();
                     };
             dialogButtons[LANG.plugins.davcal['cancel']] = function() {
                             dw_davcal__modals.hideDialog();
                     };
         }
         else
         {
             title = LANG.plugins.davcal['info'];
             dialogButtons[LANG.plugins.davcal['ok']] = function() {
                  dw_davcal__modals.hideDialog();
             };
         }
         dw_davcal__modals.$dialog = jQuery(document.createElement('div'))
             .dialog({
                 autoOpen: false,
                 draggable: true,
                 title: title,
                 resizable: true,
                 buttons: dialogButtons,
             })
             .html(
                 '<div>' + dw_davcal__modals.msg + '</div>'
             )
             .parent()
             .attr('id','dw_davcal__confirm')
             .show()
             .appendTo('.dokuwiki:first');
    
             jQuery('#dw_davcal__confirm').position({
                 my: "center",
                 at: "center",
                 of: window
             });
                  // attach event handlers
             jQuery('#dw_davcal__confirm .ui-dialog-titlebar-close').click(function(){
                 dw_davcal__modals.hideDialog();
             });
     },
     
     /**
      * Hide the edit event dialog
      */
     hideEditEventDialog : function() {
         dw_davcal__modals.$editEventDialog.empty();
         dw_davcal__modals.$editEventDialog.remove();
         dw_davcal__modals.$editEventDialog = null;
     },
     
     /**
      * Hide the confirm/info dialog
      */
     hideDialog: function() {
         dw_davcal__modals.$dialog.empty();
         dw_davcal__modals.$dialog.remove();
         dw_davcal__modals.$dialog = null;
     },
     
     /**
      * Hide the settings dialog
      */
     hideSettingsDialog: function() {
         dw_davcal__modals.$settingsDialog.empty();
         dw_davcal__modals.$settingsDialog.remove();
         dw_davcal__modals.$settingsDialog = null;
     }
 };