<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
*{
margin:0;
padding:0;
font-size:14px;
-webkit-user-select:none;
}
ul,li{
list-style:none;
}
img{
display:block;
border:none;
}
a{
display:block;
color:#000;
text-decoration: none;
}
a:hover,a:active,a:visited,a:target{
display:block;
color:#000;
text-decoration: none;
}
.banner{
position:relative;
margin:0 auto;
width:1000px;
height:300px;
overflow:hidden;
}
.banner .inner{
position:absolute;
top:0;
left:0;
height:300px;
width:1000px;/*在JS数据绑定结束后根据请求数据的多少来动态调整宽度*/
}
.banner .inner div{
float:left;
width:1000px;
height:300px;
background:url('img/default.gif') no-repeat center center #e1e1e1;
}
.banner .inner img{
display:none;
width:100%;
height:100%;
opacity:0;
filter:alpha(opacity=0);
}
.banner .bannerTip{
height:18px;
position:absolute;
right:20px;
bottom:20px;
}
.banner .bannerTip li{
float:left;
margin-left:10px;
width:18px;
height:18px;
border-radius:50%;
background:lightblue;
cursor:pointer;
}
.banner .bannerTip li.bg{
background:red;
}
.banner a{
display:none;
position:absolute;
top:50%;
margin-top:-22.5px;
width:30px;
height:45px;
background-image:url("img/pre.png");
background-repeat:no-repeat;
opacity:0.5;
filter:alpha(opacity=50);
}
.banner a:hover{
opacity:1;
filter:alpha(opacity=100);
}
.banner a.bannerLeft{
left:20px;
background-position:0 0;
}
.banner a.bannerRight{
right:20px;
background-position:-45px 0;
}
</style>
</head>
<body>
<div class='banner' id='banner'>
<div class='inner'>
<div><img src="img/banner1.jpg" alt=""></div>
<div><img src="img/banner2.jpg" alt=""></div>
<div><img src="img/banner3.jpg" alt=""></div>
<div><img src="img/banner4.jpg" alt=""></div>
</div>
<ul class='bannerTip'>
<li class='bg'></li>
<li></li>
<li></li>
<li></li>
</ul>
<a href="java script:;" class='bannerLeft'></a>
<a href="java script:;" class='bannerRight'></a>
</div>
</body>
</html>
(function(){
var banner = document.getElementById('banner');
var bannerInner = utils.firstChild(banner);
var bannerTip = utils.children(banner,'ul')[0];
var imgList = bannerInner.getElementsByTagName('img');
var oLis = bannerTip.getElementsByTagName('li');
var bannerLeft = utils.children(banner,'a')[0];
var bannerRight = utils.children(banner,'a')[1];
//实现数据绑定：Ajax请求数据、按照字符串拼接的方式绑定数据
var jsonData = null,count = null
~function(){
var xhr = new XMLHttlRequest;
xhr.open('get',"json/banner.txt?_="+Math.random(),false);
xhr.onreadystatechange = function(){
if(xhr.readyState === 4 && /^2\d{2}$/.test(xhr.status)){
jsonData = utils.formatJSON(xhr.responseText);
}
}
xhr.send(null);
}()
~function(){
//绑定轮播图区域的数据
var str = "";
if(jsonData){
for(var