https://www.gz-sitzenberg.at/web/jakarta.faces.resource/timer.js.x…?ln=esvportaljs&v=2.0.27

1function Timer() {
2	return function(duration) {
3		var _currentDuration = duration, _listeners = {
4			start : [],
5			progress : [],
6			stop : [],
7		}, _intervalId = null;
8
9		return {
10			addListener : addListener,
11			refreshDuration : refreshDuration,
12			start : start,
13			stop : stop,
14			currentDuration : _currentDuration,
15			isStopped : isStopped
16		};
17
18		function isStopped() {
19			return !_intervalId;
20		}
21
22		function eachListener(event, params) {
23			var events = _listeners[event];
24			if (!events) {
25				return;
26			}
27			for (var i = 0; i < events.length; i++) {
28				events[i](params);
29			}
30		}
31
32		function refreshDuration(duration) {
33			_currentDuration = duration;
34		}
35
36		function startEvent(tInfo) {
37			eachListener('start', tInfo);
38		}
39		function progressEvent(tInfo) {
40			eachListener('progress', tInfo);
41		}
42
43		function stopEvent(tInfo) {
44			eachListener('stop', tInfo);
45		}
46
47		function _resolveFormat(number) {
48			return number < 10 ? '0' + number : number;
49		}
50
51		function _configureInterval() {
52			var minutes = _resolveFormat(parseInt(_currentDuration / 60, 10)), seconds = _resolveFormat(parseInt(
53					_currentDuration % 60, 10));
54
55			progressEvent({
56				duration : _currentDuration,
57				minutes : minutes,
58				seconds : seconds,
59			});
60
61			if (--_currentDuration < 0) {
62				stop();
63			}
64		}
65
66		function start() {
67			if (_intervalId) {
68				console.warn('The timer has been already started...');
69				return;
70			}
71
72			startEvent({
73				duration : _currentDuration,
74			});
75			_intervalId = setInterval(_configureInterval, 1000);
76		}
77
78		function stop() {
79			if (_intervalId) {
80				clearInterval(_intervalId);
81				_intervalId = null;
82				stopEvent({
83					duration : _currentDuration,
84				});
85			} else {
86				console.warn('The timer is not running...');
87			}
88		}
89
90		function addListener(event, func) {
91			_listeners[event].push(func);
92		}
93	}.apply(null, arguments);
94}