<div class="slide_wrap">
 <ul id="slides2" class="slide">
  <li style="background:url('images/01.jpg') no-repeat center top"><a href="http://www.1sucai.cn/" target="_blank">pwstrick1</a></li>
  <li style="background:url('images/02.jpg') no-repeat center top"><a href="http://www.1sucai.cn/" target="_blank">pwstrick2</a></li>
  <li style="background:url('images/03.jpg') no-repeat center top"><a href="http://www.1sucai.cn/" target="_blank">pwstrick3</a></li>
  <li style="background:url('images/04.jpg') no-repeat center top"><a href="http://www.1sucai.cn/" target="_blank">pwstrick4</a></li>
 </ul>
</div>

.slide_wrap {width:100%;height:400px;position:relative}
.slide_wrap .slide { display:block; width:100%; height:400px; list-style:none; padding:0; margin:0; position:relative;}
.slide_wrap .slide li { display:block; width:100%; height:100%; list-style:none; padding:0; margin:0; position:absolute;}
.slide_wrap .slide li a { display:block; width:100%; height:100%; text-indent:-9999px;}
.slide_wrap .pagination { display:block; list-style:none; position:absolute; left:50%; top:340px; z-index:9900;padding:5px 15px 5px 0; margin:0}
.slide_wrap .pagination li { display:block; list-style:none; width:10px; height:10px; float:left;margin-left:15px; border-radius:5px; background:#FFF }
.slide_wrap .pagination li a { display:block; width:100%; height:100%; padding:0; margin:0; text-indent:-9999px;outline:0}
.slide_wrap .pagination li.current { background:#0092CE}

<script type="text/javascript">
 $('#slides2').jslide();
</script>

;(function (factory) {
 'use strict';
 // Register as an AMD module, compatible with script loaders like RequireJS.
 if (typeof define === 'function' && define.amd) {
  define(['jquery'], factory);
 }
 else {
  factory(jQuery);
 }
}(function ($, undefined) {
 'use strict';

　　 //中间插件代码

 $.fn.jslide = function (method) {
  return _init.apply(this, arguments);
 };
}));

　　var defaults = {
  speed : 3000,
  pageCss : 'pagination',
  auto: true //自动切换
 };
 
 var nowImage = 0;//现在是哪张图片
 var pause = false;//暂停
 var autoMethod;
　　/**
  * @method private
  * @name _init
  * @description Initializes plugin
  * @param opts [object] "Initialization options"
  */
 function _init(opts) {
  opts = $.extend({}, defaults, opts || {});
  // Apply to each element
  var $items = $(this);
  for (var i = 0, count = $items.length; i < count; i++) {
   _build($items.eq(i), opts);
  }
  return $items;
 }

  /**
  * @method private
  * @name _getSlides
  * @description 获取幻灯片对象
  * @param $node [jQuery object] "目标对象"
  */
 function _getSlides($node) {
  return $node.children('li');
 }
  /**
  * @method private
  * @name _build
  * @description Builds each instance
  * @param $node [jQuery object] "目标对象"
  * @param opts [object] "插件参数"
  */
 function _build($node, opts) {
  var $slides = _getSlides($node);
  $slides.eq(0).siblings('li').css({'display':'none'});
  var numpic = $slides.size() - 1;
  
  $node.delegate('li', 'mouseenter', function() {
   pause = true;//暂停轮播
   clearInterval(autoMethod);
  }).delegate('li', 'mouseleave', function() {
   pause = false;
   autoMethod = setInterval(function() {
    _auto($slides, $pages, opts);
   }, opts.speed);
  });
  //console.log(autoMethod)
  var $pages = _pagination($node, opts, numpic);
  
  if(opts.auto) {
   autoMethod = setInterval(function() {
    _auto($slides, $pages, opts);
   }, opts.speed);
  }
 } 

　　 /**
  * @method private
  * @name _pagination
  * @description 初始化选择按钮
  * @param $node [jQuery object] "目标对象"
  * @param opts [Object] "参数"
  * @param size [int] "图片数量"
  */
  function _pagination($node, opts, size) {
  var $ul = $('<ul>', {'class': opts.pageCss});
  for(var i = 0; i <= size; i++){
   $ul.append('<li>' + '<a href="javascript:void(0)">' + (i+1) + '</a>' + '</li>');
  }
  
  $ul.children(':first').addClass('current');//给第一个按钮选中样式
  var $pages = $ul.children('li');
  $ul.delegate('li', 'click', function() {//绑定click事件
   var changenow = $(this).index();
   _changePage($pages, $node, changenow);
  }).delegate('li', 'mouseenter', function() {
   pause = true;//暂停轮播
  }).delegate('li', 'mouseleave', function() {
   pause = false;
  });
  $node.after($ul);
  return $pages;
  }

 　　/**
  * @method private
  * @name _change
  * @description 幻灯片显示与影藏
  * @param $slides [jQuery object] "图片对象"
  * @param $pages [jQuery object] "按钮对象"
  * @param next [int] "要显示的下一个序号"
  */
  function _fadeinout($slides, $pages, next){
  $slides.eq(nowImage).css('z-index','2');
  $slides.eq(next).css({'z-index':'1'}).show();
  $pages.eq(next).addClass('current').siblings().removeClass('current');
  $slides.eq(nowImage).fadeOut(400, function(){
   $slides.eq(next).fadeIn(500);
  });
 }

　　 /**
  * @method private
  * @name _auto
  * @description 自动轮播
  * @param $slides [jQuery object] "图片对象"
  * @param $pages [jQuery object] "按钮对象"
  * @param opts [Object] "参数"
  */
  function _auto($slides, $pages, opts){
  var next = nowImage + 1;
  var size = $slides.size() - 1;
  if(!pause) {
   if(nowImage >= size){
    next = 0;
   }
   
   _fadeinout($slides, $pages, next);
   
   if(nowImage < size){
    nowImage += 1;
   }else {
    nowImage = 0;
   }
  }else {
   clearInterval(autoMethod);//暂停的时候就取消自动切换
  }
  }