请大大帮忙看看jq 轮播 不会动

$(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();}});//当滑鼠滑入区块停止自动播放$("#cd-slider").hover(function(){clearTimeout(timer);}, function(){timer = setTimeout(autoShow, speed);});//自动轮播function autoShow(){img = (img+1<myImages.length) ? img+1 : 0;$(".link li").eq(img).click();timer = setTimeout(autoShow, speed);}//启动自动轮播autoShow();

});