// page init
jQuery(function(){
	initResizeBg();
	initSlideshow();
});
jQuery(window).load(function(){
	jQuery('body').addClass('js-ready');
});

// background resize init
function initResizeBg(){
	var holder = document.getElementById('bg');
	var images = holder.getElementsByTagName('img');
	for(var i = 0; i < images.length; i++) {
		backgroundStretcher.stretchImage(images[i]); // add image to stretch collection
	}
	backgroundStretcher.setBgHolder(holder); // set holder, which will crop content
};

// slideshow init
function initSlideshow(){
	jQuery('#bg').fadeGallery({
		duration:700, //ms
		event:'mouseenter'
	});
};

// slideshow plugin
jQuery.fn.fadeGallery = function(_options){
	var _options = jQuery.extend({
		slideElements:'>li',
		pagerGener: false,
		pagerHold: false,
		pagerLinks:'.destinations-block ul li',
		btnNext:'a.btn-next',
		btnPrev:'a.btn-prev',
		btnPlayPause:'a.play-pause',
		btnPlay:'a.play',
		btnPause:'a.pause',
		pausedClass:'paused',
		disabledClass: 'disabled',
		playClass:'playing',
		activeClass:'active',
		currentNum:false,
		allNum:false,
		startSlide:null,
		noCircle:false,
		caption:'ul.caption > li',
		pauseOnHover:false,
		autoRotation:false,
		autoHeight:false,
		onChange:false,
		switchTime:3000,
		duration:650,
		event:'click'
	},_options);

	return this.each(function(){
		// gallery options
		var _this = jQuery(this);
		var _slides = jQuery(_options.slideElements, _this);
		var _btnPrev = jQuery(_options.btnPrev, _this);
		var _btnNext = jQuery(_options.btnNext, _this);
		var _btnPlayPause = jQuery(_options.btnPlayPause, _this);
		var _btnPause = jQuery(_options.btnPause, _this);
		var _btnPlay = jQuery(_options.btnPlay, _this);
		var _pauseOnHover = _options.pauseOnHover;
		var _autoRotation = _options.autoRotation;
		var _activeClass = _options.activeClass;
		var _disabledClass = _options.disabledClass;
		var _pausedClass = _options.pausedClass;
		var _playClass = _options.playClass;
		var _autoHeight = _options.autoHeight;
		var _duration = _options.duration;
		var _switchTime = _options.switchTime;
		var _controlEvent = _options.event;
		var _currentNum = (_options.currentNum ? jQuery(_options.currentNum, _this) : false);
		var _allNum = (_options.allNum ? jQuery(_options.allNum, _this) : false);
		var _startSlide = _options.startSlide;
		var _noCycle = _options.noCircle;
		var _onChange = _options.onChange;
		var _pagerGener = _options.pagerGener;
		var _pagerHold = jQuery(_options.pagerHold,_this);
		var _caption = jQuery(_options.caption,_this);
		var _paging = '';
		if(_pagerGener){
			for(var i=0; i< _slides.length; i++){
				_paging += '<li><a href="#">'+(i+1)+'</a></li>';
			}
			_pagerHold.html('<ul>'+_paging+'</ul>');
		}
		var _pagerLinks = jQuery(_options.pagerLinks);
		// gallery init
		var _hover = false;
		var _prevIndex = 0;
		var _currentIndex = 0;
		var _slideCount = _slides.length;
		var _timer;
		if(_slideCount < 2) return;

		_prevIndex = _slides.index(_slides.filter('.'+_activeClass));
		if(_prevIndex < 0) _prevIndex = _currentIndex = 0;
		else _currentIndex = _prevIndex;
		if(_startSlide != null) {
			if(_startSlide == 'random') _prevIndex = _currentIndex = Math.floor(Math.random()*_slideCount);
			else _prevIndex = _currentIndex = parseInt(_startSlide);
		}
		_slides.hide().eq(_currentIndex).show();
		_caption.hide().eq(_currentIndex).show();
		if(_autoRotation) _this.removeClass(_pausedClass).addClass(_playClass);
		else _this.removeClass(_playClass).addClass(_pausedClass);

		// gallery control
		if(_btnPrev.length) {
			_btnPrev.bind(_controlEvent,function(){
				prevSlide();
				return false;
			});
		}
		if(_btnNext.length) {
			_btnNext.bind(_controlEvent,function(){
				nextSlide();
				return false;
			});
		}
		if(_pagerLinks.length) {
			_pagerLinks.each(function(_ind){
				jQuery(this).bind(_controlEvent,function(){
					if(_currentIndex != _ind) {
						_prevIndex = _currentIndex;
						_currentIndex = _ind;
						switchSlide();
					}
					return false;
				});
			});
		}

		// play pause section
		if(_btnPlayPause.length) {
			_btnPlayPause.bind(_controlEvent,function(){
				if(_this.hasClass(_pausedClass)) {
					_this.removeClass(_pausedClass).addClass(_playClass);
					_autoRotation = true;
					autoSlide();
				} else {
					_autoRotation = false;
					if(_timer) clearTimeout(_timer);
					_this.removeClass(_playClass).addClass(_pausedClass);
				}
				return false;
			});
		}
		if(_btnPlay.length) {
			_btnPlay.bind(_controlEvent,function(){
				_this.removeClass(_pausedClass).addClass(_playClass);
				_autoRotation = true;
				autoSlide();
				return false;
			});
		}
		if(_btnPause.length) {
			_btnPause.bind(_controlEvent,function(){
				_autoRotation = false;
				if(_timer) clearTimeout(_timer);
				_this.removeClass(_playClass).addClass(_pausedClass);
				return false;
			});
		}
		// gallery animation
		function prevSlide() {
			_prevIndex = _currentIndex;
			if(_currentIndex > 0) _currentIndex--;
			else {
				if(_noCycle) return;
				else _currentIndex = _slideCount-1;
			}
			switchSlide();
		}
		function nextSlide() {
			_prevIndex = _currentIndex;
			if(_currentIndex < _slideCount-1) _currentIndex++;
			else {
				if(_noCycle) return;
				else _currentIndex = 0;
			}
			switchSlide();
		}
		function refreshStatus() {
			if(_pagerLinks.length) _pagerLinks.removeClass(_activeClass).eq(_currentIndex).addClass(_activeClass);
			if(_currentNum) _currentNum.text(_currentIndex+1);
			if(_allNum) _allNum.text(_slideCount);
			_slides.eq(_prevIndex).removeClass(_activeClass);
			_slides.eq(_currentIndex).addClass(_activeClass);
			if(_noCycle) {
				if(_btnPrev.length) {
					if(_currentIndex == 0) _btnPrev.addClass(_disabledClass);
					else _btnPrev.removeClass(_disabledClass);
				}
				if(_btnNext.length) {
					if(_currentIndex == _slideCount-1) _btnNext.addClass(_disabledClass);
					else _btnNext.removeClass(_disabledClass);
				}
			}
			if(typeof _onChange === 'function') {
				_onChange(_this, _currentIndex);
			}
		}
		function switchSlide() {
			_slides.eq(_prevIndex).stop().animate({opacity:0},{duration: _duration, queue: false,complete:function(){
				jQuery(this).css({display:'none'});
			}})
			_slides.eq(_currentIndex).stop().css({display:'block',opacity:0}).animate({opacity:1},{duration: _duration, queue: false,complete:function(){
				jQuery(this).css({opacity:''});
			}})
			_caption.eq(_prevIndex).fadeOut();
			_caption.eq(_currentIndex).fadeIn();
			if(_autoHeight) _slides.eq(_currentIndex).parent().animate({height:_slides.eq(_currentIndex).outerHeight(true)},{duration:_duration,queue:false});
			refreshStatus();
			autoSlide();
		}

		// autoslide function
		function autoSlide() {
			if(!_autoRotation || _hover) return;
			if(_timer) clearTimeout(_timer);
			_timer = setTimeout(nextSlide,_switchTime+_duration);
		}
		if(_pauseOnHover) {
			_this.hover(function(){
				_hover = true;
				if(_timer) clearTimeout(_timer);
			},function(){
				_hover = false;
				autoSlide();
			});
		}
		refreshStatus();
		autoSlide();
	});
};

// image stretch module
backgroundStretcher = {
	images: [],
	holders: [],
	viewWidth: 0,
	viewHeight: 0,
	stretchByWindow: false, // or entire page
	init: function(){
		this.addHandlers();
		this.resizeAll();
		return this;
	},
	stretchImage: function(obj) {
		var img = new Image();
		img.onload = this.bind(function(){
			obj.iRatio = img.width / img.height;
			obj.iWidth = img.width;
			obj.iHeight = img.height;
			obj.style.msInterpolationMode = 'bicubic'; // IE7 fix
			this.resizeImage(obj);
		});
		img.src = obj.src;
		this.images.push(obj);
	},
	setBgHolder: function(obj) {
		this.holders.push(obj);
		this.resizeAll();
	},
	resizeImage: function(obj) {
		if(obj.iRatio) {
			var slideWidth = this.viewWidth;
			var slideHeight = slideWidth / obj.iRatio;
			if(slideHeight < this.viewHeight) {
				slideHeight = this.viewHeight;
				slideWidth = slideHeight * obj.iRatio;
			}
			obj.style.width = slideWidth+'px';
			obj.style.height = slideHeight+'px';
			obj.style.top = (this.viewHeight - slideHeight)/2+'px';
			obj.style.left = (this.viewWidth - slideWidth)/2+'px';
		}
	},
	resizeHolder: function(obj) {
		obj.style.width = this.viewWidth+'px';
		obj.style.height = this.viewHeight+'px';
	},
	getWindowWidth: function() {
		return typeof window.innerWidth === 'number' ? window.innerWidth : document.documentElement.clientWidth;
	},
	getWindowHeight: function() {
		return typeof window.innerHeight === 'number' ? window.innerHeight : document.documentElement.clientHeight;
	},
	getPageWidth: function() {
		if(!document.body) return 0;
		return Math.max(
			Math.max(document.body.clientWidth, document.documentElement.clientWidth),
			Math.max(document.body.offsetWidth, document.body.scrollWidth)
		);
	},
	getPageHeight: function() {
		if(!document.body) return 0;
		return Math.max(
			Math.max(document.body.clientHeight, document.documentElement.clientHeight),
			Math.max(document.body.offsetHeight, document.body.scrollHeight)
		);
	},
	resizeAll: function() {
		// crop holder width by window size
		for(var i = 0; i < this.holders.length; i++) {
			this.holders[i].style.width = '100%'; 
		}
		
		// delay required for IE to handle resize
		clearTimeout(this.resizeTimer);
		this.resizeTimer = setTimeout(this.bind(function(){
			// hide background holders
			for(var i = 0; i < this.holders.length; i++) {
				this.holders[i].style.display = 'none';
			}
			
			// calculate real page dimensions with hidden background blocks
			this.viewWidth = this[this.stretchByWindow ? 'getWindowWidth' : 'getPageWidth']();
			this.viewHeight = this[this.stretchByWindow ? 'getWindowHeight' : 'getPageHeight']();
			
			// show and resize all background holders
			for(i = 0; i < this.holders.length; i++) {
				this.holders[i].style.display = 'block';
				this.resizeHolder(this.holders[i]);
			}
			for(i = 0; i < this.images.length; i++) {
				this.resizeImage(this.images[i]);
			}
		}),10);
	},
	addHandlers: function() {
		if (window.addEventListener) window.addEventListener('resize', this.bind(this.resizeAll), false);
		else if (window.attachEvent) window.attachEvent('onresize', this.bind(this.resizeAll));
	},
	bind: function(fn, scope, args) {
		var newScope = scope || this;
		return function() {
			return fn.apply(newScope, args || arguments);
		}
	} 
}.init();

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