<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title><style type="text/css">
*{ margin: 0; padding: 0; text-decoration: none;}
body { padding: 20px;}
#container { width: 600px; height: 400px; border: 3px solid #333; overflow: hidden; position: relative;}
#list { width: 4200px; height: 400px; position: absolute; z-index: 1;}
#list img { float: left;}
#buttons { position: absolute; height: 10px; width: 100px; z-index: 2; bottom: 20px; left: 250px;}
#buttons span { cursor: pointer; float: left; border: 1px solid #fff; width: 10px; height: 10px; border-radius: 50%; background: #333; margin-right: 5px;}
#buttons .on { background: orangered;}
.arrow { cursor: pointer; display: none; line-height: 39px; text-align: center; font-size: 36px; font-weight: bold; width: 40px; height: 40px; position: absolute; z-index: 2; top: 180px; background-color: RGBA(0,0,0,.3); color: #fff;}
.arrow:hover { background-color: RGBA(0,0,0,.7);}
#container:hover .arrow { display: block;}
#prev { left: 20px;}
#next { right: 20px;}
</style>
<script type="text/javascript">
window.onload = function () {
var container = document.getElementById('container');
var list = document.getElementById('list');
var buttons = document.getElementById('buttons').getElementsByTagName('span');
var prev = document.getElementById('prev');
var next = document.getElementById('next');
var index = 1;
function showButton() {
for (var i = 0; i < buttons.length ; i++) {
if( buttons[i].className == 'on'){
buttons[i].className = '';
break;
}
}
buttons[index - 1].className = 'on';
}
function animate(offset){
var newLeft=parseInt(list.style.left)+offset;
list.style.left=newLeft+'px';
if(newLeft>-600){list.style.left=-3000+'px';
}
if(newLeft<-3000){list.style.left=-600+'px';}
}
next.onclick = function () { if (index == 5) {
index = 1;
}
else {
index += 1;
}
animate(-600);
showButton();
}
prev.onclick = function () {
if (index == 1) {
index = 5;
}
else {
index -= 1;
}
animate(600);
showButton();
}
</script>
</head>
<body>
<div id="container">
<div id="list" style="left: -600px;">
<img src="images/0.jpg" alt="1"/>
<img src="images/4354_27d6d4fb6-61be-4a56-b046-8c4c90c707d7.png" alt="1"/>
<img src="images/294422825739568090_.jpg" alt="2"/>
<img src="images/mzl.tsrvdtee.175x175-75.png" alt="3"/>
<img src="images/u=493782737,3064530006&fm=21&gp=0.jpg" alt="4"/>
<img src="images/u=1602452522,2035743143&fm=21&gp=0.jpg" alt="5"/>
<img src="images/c1bca6a39e4f2637-e6da0b2b85c0cc73-bf2de4416304fd7b757f118a18892782.jpg" alt="5"/>
</div>
<div id="buttons">
<span index="1" class="on"></span>
<span index="2"></span>
<span index="3"></span>
<span index="4"></span>
<span index="5"></span>
</div>
<a href="javascript:;" id="prev" class="arrow"><</a>
<a href="javascript:;" id="next" class="arrow">></a>
</div>
</div>
</body>
</html>
你还没写完吧，这是我的所有代码，你比对一下吧，希望能帮到你
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{margin: 0;padding: 0;text-decoration: none;}
#container{width: 960px;height: 350px;overflow: hidden;position: relative;}
#list{width: 6720px;height: 350px;position: absolute;z-index: 10;}
#list img{
float: left;
}
#buttons{position: absolute;height: 10px;width: 100px;z-index: 20;bottom: 20px; left:400px;}
#buttons span{cursor: pointer;float: left;border: 1px solid #fff;width: 10px;height: 10px;border-radius: 50%; background: #333; margin-right: 5px;}
#buttons .on { background: orangered;}
.arrow { cursor: pointer; display: none; line-height: 39px; text-align: center; font-size: 36px; font-weight: bold; width: 40px; height: 40px; position: absolute; z-index: 40; top: 150px; background-color: RGBA(0,0,0,.3); color: #fff;}
.arrow:hover { background-color: RGBA(0,0,0,.7);}
#container:hover .arrow { display: block;}
#prev { left: 20px;}
#next { right: 20px;}
</style>
<script type="text/javascript">
window.onload=function(){
var container=document.getElementById('container');
var list=document.getElementById('list');
var buttons=document.getElementById('buttons').getElementsByTagName('span');
var prev=document.getElementById('prev');
var next=document.getElementById('next');
var index=1;
var animated=false;
var timer;
function showButton(){
for (var i = 0; i < buttons.length; i++) {
if (buttons[i].className=='on') {
buttons[i].className='';
break;
};
};
buttons[index-1].className='on';
}
function arrows(num){
animated=true;
var newLeft=parseInt(list.style.left)+num;
// list.style.left=-960px,它本身是个数组，所以要用parseInt()转换成数字
var time=3000;//位移总时间
var interval=10;//位移间隔时间；
var speed=num/(time/interval);//每次位移量
function go(){
if ((speed<0&&parseInt(list.style.left)>newLeft)||(speed>0&&parseInt(list.style.left)<newLeft)) {
list.style.left=parseInt(list.style.left)+speed+'px';
setTimeout(go,interval);
} else{
animated=false;
list.style.left=newLeft+'px';
if (newLeft>-960) {
list.style.left=-4800+'px';
}
if (newLeft<-4800) {
list.style.left=-960+'px';
}
};
}
go();
//alert(parseInt(list.style.left))
}
next.onclick=function(){
if (!animated) {
if (index==5) {
index=1
} else{
index+=1;
};
showButton()
arrows(-960);
};
}
prev.onclick=function(){
if (!animated) {
if (index==1) {
index=5
} else{
index-=1;
};
arrows(-960);
showButton()};
}
function play(){
timer=setInterval(function(){
next.onclick();
},3000)
}
function stop(){
clearInterval(timer);
}
for (var i = 0; i < buttons.length; i++) {
buttons[i].onclick=function(){
// 如果当前的样式为"on"则不执行下面的程序
if (this.className=='on') {
return;
};
// getAttribute()方法返回指定属性名的属性值
var myIndex=parseInt(this.getAttribute('index'));
//alert(myIndex);
var num=-960*(myIndex-index);
// alert(index);
// alert(myIndex-index);
// arrows函数把num加上当前的left值
if (animated==false) {
arrows(num);
};
index=myIndex;
showButton();
}
}
container.onmouseover=stop;
container.onmouseout=play;
}
</script>
</head>
<body>
<div id="container">
<div id="list" style="left:-960px;">
<img src="images/5.png" alt="">
<img src="images/1.png" alt="">
<img src="images/2.png" alt="">
<img src="images/3.png" alt="">
<img src="images/4.png" alt="">
<img src="images/5.png" alt="">
<img src="images/1.png" alt="">
</div>
<div id="buttons">
<span index="1"></span>
<span index="2"></span>
<span index="3"></span>
<span index="4"></span>
<span index="5"></span>
</div>
<a href="javascript:;" id="prev"><</a>
<a href="javascript:;" id="next">></a>
</div>
</body>
</html>