.imgList li{float:left;display: inline;}
#prev,
#next{position: absolute;top:80px;z-index: 20;cursor: pointer;opacity: 0.2;filter:alpha(opacity=20);}
#prev{left: 10px;}
#next{right: 10px;}
#prev:hover,
#next:hover{opacity: 0.5;filter:alpha(opacity=50);}
.bg{position: absolute;bottom: 0;width: 400px;height: 40px;z-index:20;opacity: 0.4;filter:alpha(opacity=40);background: black;}
.infoList{position: absolute;left: 10px;bottom: 10px;z-index: 30;}
.infoList li{display: none;}
.infoList .infoOn{display: inline;color: white;}
.indexList{position: absolute;right: 10px;bottom: 5px;z-index: 30;}
.indexList li{float: left;margin-right: 5px;padding: 2px 4px;border: 2px solid black;background: grey;cursor: pointer;}
.indexList .indexOn{background: red;font-weight: bold;color: white;}
</style>
</head>
<body>
<div id="wrapper"><!-- 最外层部分 -->
<div id="banner"><!-- 轮播部分 -->
<ul class="imgList"><!-- 图片部分 -->
<li><a href="#"><img src="./img/test1.jpg" width="400px" height="200px" alt="puss in boots1"></a></li>
<li><a href="#"><img src="./img/test2.jpg" width="400px" height="200px" alt="puss in boots2"></a></li>
<li><a href="#"><img src="./img/test3.jpg" width="400px" height="200px" alt="puss in boots3"></a></li>
<li><a href="#"><img src="./img/test4.jpg" width="400px" height="200px" alt="puss in boots4"></a></li>
<li><a href="#"><img src="./img/test5.jpg" width="400px" height="200px" alt="puss in boots5"></a></li>
</ul>
<img src="./img/prev.png" width="20px" height="40px" id="prev">
<img src="./img/next.png" width="20px" height="40px" id="next">
<div class="bg"></div> <!-- 图片底部背景层部分-->
<ul class="infoList"><!-- 图片左下角文字信息部分 -->
<li class="infoOn">puss in boots1</li>
<li>puss in boots2</li>
<li>puss in boots3</li>
<li>puss in boots4</li>
<li>puss in boots5</li>
</ul>
<ul class="indexList"><!-- 图片右下角序号部分 -->
<li class="indexOn">1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ul>
</div>
</div>
<script type="text/javascript">
var curIndex = 0, //当前index
imgArr = getElementsByClassName("imgList")[0].getElementsByTagName("li"), //获取图片组
imgLen = imgArr.length,
infoArr = getElementsByClassName("infoList")[0].getElementsByTagName("li"), //获取图片info组
