3 files changed, 19 insertions, 7 deletions
diff --git a/www/index.html b/www/index.html
index e0a4338..8544b28 100644
--- a/www/index.html
+++ b/www/index.html
@@ -184,6 +184,7 @@
   <script type="text/javascript">
     auth_init();
     apps_init();
+    clock_init();
   </script>
 
  </body>
diff --git a/www/js/shows.js b/www/js/shows.js
index eddb80f..13bc9be 100644
--- a/www/js/shows.js
+++ b/www/js/shows.js
@@ -349,15 +349,12 @@ function shows_init() {
   data = { LOGIN_NAME: auth_username, PASSWORD: auth_token };
   $.post("/rh-bin/listdropboxes.cgi", data, shows_updateList, "xml")
   shows_drawClock('Do, 1.1.1970', '00:00:00', 0);
-  shows_clock = new Clock(shows_drawClock);
-  shows_clock.start();
+  clock_add_callback(shows_drawClock);
 }
 
 function shows_cleanup() {
   sessionStorage.removeItem("shows_currentid");
   delete shows_currentid;
-  shows_clock.stop();
-  delete shows_clock;
   shows_list = [];
   shows_group_carts = {};
   shows_log_carts = [];
diff --git a/www/js/utils.js b/www/js/utils.js
index 3123c9c..eeebadd 100644
--- a/www/js/utils.js
+++ b/www/js/utils.js
@@ -96,8 +96,8 @@ function get_rd_week(msEpoch) {
   return week;
 }
 
-function Clock(draw_callback) {
-  this.draw_callback = draw_callback;
+function Clock() {
+  this.draw_callbacks = $.Callbacks('unique');
 
   this.last_message = { t1: 0, t2: 0, t3: 0, t4: 0, tz_offset: 3600 };
   this.clock_offset = 0;
@@ -115,7 +115,11 @@ function Clock(draw_callback) {
     time_str += (rdtime.getUTCMinutes() > 9 ? ':' : ':0') + rdtime.getUTCMinutes();
     time_str += (rdtime.getUTCSeconds() > 9 ? ':' : ':0') + rdtime.getUTCSeconds();
 
-    this.draw_callback(date_str, time_str, get_rd_week(rdtime_ms));
+    this.draw_callbacks.fireWith(window, [date_str, time_str, get_rd_week(rdtime_ms)]);
+  }
+
+  this.addCallback = function(cb) {
+    this.draw_callbacks.add(cb);
   }
 
   this.ntp_update = function(event) {
@@ -176,3 +180,13 @@ function Clock(draw_callback) {
     this.sock.close();
   }
 }
+
+var clock = new Clock();
+
+function clock_init() {
+  clock.start();
+}
+
+function clock_add_callback(cb) {
+  clock.addCallback(cb);
+}