Testing Custom Countdown plugin

gistfile1.js

(function($){
 
	$.fn.wedgeCountdown = function(options) {
 
		//set default options
		var defaults = {
			date		: null,
			showSeconds	: true,
			complete	: null,
			completeText: "Timer done!"
		};

		// call options/defaults
		options = $.extend(defaults, options);
 
		return this.each(function(){
			var $this = $(this);
			var interval, countDownTime;

			function convertDateToUtc(convertedDate) {
				convertedDate = new Date(convertedDate);

				// get timezone offset in seconds
				var utcOffset = convertedDate.getTimezoneOffset() * 60;

				// get countdown date
				convertedDate = Date.parse(convertedDate) / 1000;

				// calculate final countDownDate with offset
				convertedDate = convertedDate + utcOffset;

				return convertedDate;
			}

			function countDown() {
				// get countdown date and convert to UTC
				var countDownDate = $this.attr('datetime');
				countDownDate = convertDateToUtc(countDownDate);

				// get current date and convert to UTC
				var currentDate = Math.floor($.now());
				currentDate = convertDateToUtc(currentDate);

				// get difference
				var seconds = countDownDate - currentDate;

				

				// find out all days, minutes, seconds
				var days = Math.floor(seconds / (60 * 60 * 24));
				seconds -= days * 60 *60 * 24;

				var hours = Math.floor(seconds / (60 * 60));
				seconds -= hours * 60 * 60;

				var minutes = Math.floor(seconds / 60);
				seconds -= minutes * 60;

				// add 0 to number if less than 10 for spacing
				if (days < 10) {
					days = '0' + days;
				}
				if (hours < 10) {
					hours = '0' + hours;
				}
				if (minutes < 10) {
					minutes = '0' + minutes;
				}
				if (seconds < 10) {
					seconds = '0' + seconds;
				}

				// create counter var
				if (days > 0) {
					countDownTime = days + 'd ' + hours + 'h ' + minutes + 'm ';
				} else {
					countDownTime = hours + 'h ' + minutes + 'm ';
				}

				// show seconds unless option is false
				if (options.showSeconds === true) {
					countDownTime = countDownTime + ' ' + seconds + 's';
				}

				// when countDownDate is past
				if (countDownDate <= currentDate) {
					clearInterval(interval);
					countDownTime = options.completeText;
					// if exists, run complete callback
					if (options.complete !== null) {
						options.complete();
					}
				}

				// replace element with countdown length
				$this.text(countDownTime);


			}

			var intervalRate = 1000;

			// check timer every second
			interval = setInterval(countDown, intervalRate);

		});

			
	};
})(jQuery);