<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
a{
text-decoration: none;
}
li,ul{
list-style: none;
}
#container{
margin: 20px;
width: 440px;
height: 220px;
border-bottom: 20px solid #000;
background: #000;
position: relative;
overflow: hidden;
}
#list{
width: 3080px;
height: 220px;
z-index: 1;
position: absolute;
}
#list img{
float: left;
}
.arrow{
width: 40px;
height: 40px;
line-height: 40px;
color: #fff;
z-index: 2;
position: absolute;
top: 90px;
background: RGBA(0,0,0,.3);
text-align: center;
font-size: 20px;
font-weight: bold;
display: none;
}
#container:hover .arrow{
display: block;
}
.arrow:hover{
background-color: RGBA(0,0,0,.7);
}
#buttons{
width: 120px;
height: 15px;
position: absolute;
bottom: 10px;
left: 170px;
z-index: 2;
}
#buttons li{
height: 15px;
width: 15px;
background: #eee;
border:1px solid #999;
border-radius: 50%;
float: left;
margin-left: 5px;
cursor: pointer;
}
#buttons .on{
background: #DE752D;
}
#next{
right: 20px;
}
#prev{
left: 20px;
}
</style>
</head>
<body>
<div id="container">
<div id="list" style="left: -440px">
<img src="5.jpg">
<img src="1.jpg">
<img src="2.jpg">
<img src="3.jpg">
<img src="4.jpg">
<img src="5.jpg">
<img src="1.jpg">
</div>
<ul id="buttons">
<li index="1"></li>
<li index="2"></li>
<li index="3"></li>
<li index="4"></li>
<li index="5"></li>
</ul>
<a href="javascript:;" id="prev"><</a>
<a href="javascript:;" id="next">></a>
</div>
<script type="text/javascript">
window.onload = function(){
var container = document.getElementById('container');
var list = document.getElementById('list');
var prev = document.getElementById('prev');
var next = document.getElementById('next');
var buttons = document.getElementById('buttons').getElementsByTagName('li');
var index = 1;
function showbutton(){
for (var i = 0; i < buttons.length; i++) {
if(buttons[i].className == 'on'){
buttons[i].className = '';
}
}
buttons[index - 1].className ='on';
}
function animate(offset){
var newleft = parseInt(list.style.left) + offset;
var time = 440;
var inteval = 10;
var speed = offset/(time/inteval);
function goto() {
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(goto, inteval);
}
else {
list.style.left = parseInt(list.style.left) +offset + 'px';
if (newleft < -2200){
list.style.left = -440 + 'px';
}
if (newleft > -440){
list.style.left = -2200 + 'px';
}
}
}
debugger;
}
next.onclick = function(){
if (index == 5) {
index =1;
} else {
index += 1;
}
showbutton();
animate(-440);
}
prev.onclick = function(){
if (index == 1) {
index =5;
} else {
index -= 1;
}
showbutton();
animate(440);
}
for (var i = 0; i < buttons.length; i++) {
buttons[i].onclick = function(){
var myindex = parseInt(this.getAttribute('index'));
var offset = -440 * (myindex - index);
animate(offset);
index = myindex;
showbutton();
}
}
}
</script>
</body>
</html>
