https://163motors.ru/bitrix/templates/dresscode/js/dwTimer.js

1$(function () {
2	jQuery.fn.dwTimer = function (options) {
3		var options = $.extend(
4			{
5				timerLoop: false,
6				startDate: false,
7				endDate: false
8			},
9			options
10		);
11
12		//vars
13		var timeoutID;
14
15		//j vars
16		var $this = this;
17		var $dayContainer = $this.find(".timerDayValue");
18		var $hourContainer = $this.find(".timerHourValue");
19		var $minuteContainer = $this.find(".timerMinuteValue");
20		var $secondContainer = $this.find(".timerSecondValue");
21
22		//functions
23		var calculateValues = function () {
24			//set vars
25			curDate = new Date();
26
27			//calculate
28			var remainingDate = new Date(endDate.getTime() - curDate.getTime());
29			var remainingSecond = Math.floor((remainingDate / 1000) % 60);
30			var remainingMinute = Math.floor((remainingDate / 1000 / 60) % 60);
31			var remainingHour = Math.floor((remainingDate / (1000 * 60 * 60)) % 24);
32			var remainingDay = Math.floor(remainingDate / (1000 * 60 * 60 * 24));
33
34			//write DOM
35			$dayContainer.text(remainingDay);
36			$hourContainer.text(remainingHour);
37			$minuteContainer.text(remainingMinute);
38			$secondContainer.text(remainingSecond);
39		};
40
41		// set end time value
42		if (options["timerLoop"] > 0 && options["startDate"] > 0) {
43			//loop mode
44
45			var endDate = new Date(options["startDate"] * 1000); // timestamp msec  (php time() * 1000)
46			var curDate = new Date();
47
48			//set end date form option
49			endDate.setDate(endDate.getDate() + parseInt(options["timerLoop"])); // set tmp endDate
50
51			//loop mode
52			while (endDate.getTime() <= curDate.getTime()) {
53				endDate.setDate(endDate.getDate() + parseInt(options["timerLoop"]));
54			}
55		} else if (options["endDate"] != "") {
56			var endDate = new Date(options["endDate"] * 1000); // timestamp msec  (php time() * 1000)
57			var curDate = new Date();
58		}
59
60		timeoutID = setInterval(function () {
61			calculateValues();
62		}, 1000);
63
64		//start timer
65		calculateValues();
66	};
67});