将时区整合到我的jquery倒计时中

Question

我在网上搜索过，我所得到的只是结果是进行新的倒计时，而不是将时区整合到我的jquery倒计时中，这不是我正在寻找的，因为我正在寻找将新的js整合到我目前的倒计时设计中。 下面是我目前拥有的js和html代码，它从用户计算机时间开始倒计时，而不是从特定的时区时间开始计算。

有人可以根据指定的时区告诉我要输入的代码（例如+8：00）

提前致谢：

HTML ：

<div id="counter" class="counter" data-date="July 13, 2015">
<div class="timer-col"> <span id="days"></span> <span class="timer-type">d</span> </div>
<div class="timer-col"> <span id="hours"></span> <span class="timer-type">h</span> </div>
<div class="timer-col"> <span id="minutes"></span> <span class="timer-type">m</span> </div>
<div class="timer-col"> <span id="seconds"></span> <span class="timer-type">s</span> </div>
</div>

JS ：

(function($) {

$.fn.countdown = function(toDate, callback) {
var handlers = ['seconds', 'minutes', 'hours', 'days', 'weeks', 'daysLeft'];

function delegate(scope, method) {
return function() { return method.call(scope) }
}

return this.each(function() {
// Convert
if(!(toDate instanceof Date)) {
if(String(toDate).match(/^[0-9]*$/)) {
toDate = new Date(toDate);
} else if( toDate.match(/([0-9]{1,2})\/([0-9]{1,2})\/([0-9]{2,4})\s([0-9]{1,2})\:([0-9]{2})\:([0-9]    {2})/) ||
toDate.match(/([0-9]{2,4})\/([0-9]{1,2})\/([0-9]{1,2})\s([0-9]{1,2})\:([0-9]{2})\:([0-9]{2})/)
) {
toDate = new Date(toDate);
} else if(toDate.match(/([0-9]{1,2})\/([0-9]{1,2})\/([0-9]{2,4})/) ||
toDate.match(/([0-9]{2,4})\/([0-9]{1,2})\/([0-9]{1,2})/)
) {
toDate = new Date(toDate)
} else {
throw new Error("Doesn't seen to be a valid date object or string")
}
}

var $this = $(this),
values = {},
lasting = {},
interval = $this.data('countdownInterval'),
currentDate = new Date(),
secondsLeft = Math.floor((toDate.valueOf() - currentDate.valueOf()) / 1000);

function triggerEvents() {
secondsLeft--;
if(secondsLeft < 0) {
secondsLeft = 0;
}
lasting = {
seconds : secondsLeft % 60,
minutes : Math.floor(secondsLeft / 60) % 60,
hours : Math.floor(secondsLeft / 60 / 60) % 24,
days : Math.floor(secondsLeft / 60 / 60 / 24),
weeks : Math.floor(secondsLeft / 60 / 60 / 24 / 7),
daysLeft: Math.floor(secondsLeft / 60 / 60 / 24) % 7
}
for(var i=0; i<handlers.length; i++) {
var eventName = handlers[i];
if(values[eventName] != lasting[eventName]) {
values[eventName] = lasting[eventName];
dispatchEvent(eventName);
}
}
if(secondsLeft == 0) {
stop();
dispatchEvent('finished');
}
}
triggerEvents();

function dispatchEvent(eventName) {
var event = $.Event(eventName);
event.date = new Date(new Date().valueOf() + secondsLeft);
event.value = values[eventName] || "0";
event.toDate = toDate;
event.lasting = lasting;
switch(eventName) {
case "seconds":
case "minutes":
case "hours":
event.value = event.value < 10 ? '0'+event.value.toString() : event.value.toString();
break;
default:
if(event.value) {
event.value = event.value.toString();
}
break;
}
callback.call($this, event);
}

$this.bind('remove', function() {
stop(); // If the selector is removed clear the interval for memory sake!
dispatchEvent('removed');
});

function stop() {
clearInterval(interval);
}

function start() {
$this.data('countdownInterval', setInterval(delegate($this, triggerEvents), 1000));
interval = $this.data('countdownInterval');
}

if(interval) stop();
start();
});
}
// Wrap the remove method to trigger an event when called
var removeEvent = new $.Event('remove'),
removeFunction = $.fn.remove;
$.fn.remove = function() {
$(this).trigger(removeEvent);
return removeFunction.apply(this, arguments);
}
})(jQuery);