$(function() {
var cdSlider = $(".cd-slider"),
slides = cdSlider.find('li'),
nav = cdSlider.children('nav'),
count = nav.children('.count');

if ( slides.length <= 1 ) {
	nav.css('display', 'none');
}

slides.eq(0).addClass('current');

slides.last().addClass('prev_slide');

count.append('<span class="current_number">1</span><span class="total">'+ slides.length +'</span>');

var updateCount = function (nextIndex, prevIndex) {
	$(".current_number").text(nextIndex + 1, prevIndex + 1);
}

function nextSlider() {
	var current = cdSlider.find('li.current'),
		nextSlide = ( current.next().length > 0 ) ? current.next() : slides.eq(0);

	nextSlide.addClass('current').removeClass('prev_slide').siblings().removeClass('current');
	nextSlide.prevAll().addClass('prev_slide');
	nextSlide.nextAll().removeClass('prev_slide');

	if ( nextSlide.index() == slides.last().index() ) {
		slides.eq(0).removeClass('prev_slide');
	}

	if ( nextSlide.index() == 0 ) {
		slides.last().addClass('prev_slide');
	}

	updateCount(nextSlide.index());

}

function prevSlider() {
	var current = cdSlider.find('li.current'),
		prevSlide = ( current.prev().length > 0 ) ? current.prev() : slides.last();

	prevSlide.addClass('current').removeClass('prev_slide').siblings().removeClass('current');
	prevSlide.prevAll().addClass('prev_slide');

	if ( prevSlide.index() == 0 ) {
		slides.last().addClass('prev_slide');
	}

	if ( prevSlide.index() == slides.last().index() ) {
		prevSlide.prevAll().addClass('prev_slide');
		slides.eq(0).removeClass('prev_slide');
	}

	updateCount(prevSlide.index());

}

$(".next").on('click', function(event) {
	event.preventDefault();
	nextSlider();
});

$(".prev").on('click', function(event) {
	event.preventDefault();
	prevSlider();
});

$(document).keyup(function(event) {
	if (event.which=='37') {
		prevSlider();
	} else if (event.which=='39') {
		nextSlider();
	}
});
//當滑鼠滑入區塊停止自動播放
$("#cd-slider").hover(function(){
	clearTimeout(timer);
}, function(){
	timer = setTimeout(autoShow, speed);
});

//自動輪播
function autoShow(){
	img = (img+1<myImages.length) ? img+1 : 0;
	$(".link li").eq(img).click();
	timer = setTimeout(autoShow, speed);
}

//啟動自動輪播
autoShow();	

});