<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
*{
margin: 0;
padding: 0;
}
span{
position:absolute;
left:0px;
top:170px;
width: 50px;
height: 50px;
background-color:#7f7f7f;
font-size: 30px;
line-height: 50px;
text-align: center;
opacity:0.5;
}
#right{
left:770px;
}
#picNav{
position:absolute;
top:300px;
left:300px;
}
#picNav li{
width: 20px;
height: 20px;
background-color: #ccc;
float: left;
margin-right:20px;
list-style: none;
text-align: center;
line-height: 20px;
opacity:0.8;
}
#picNav .active{
background-color: yellow;
}
</style>
</head>
<body>
<img src="images/1.png" alt="" id="pic">
<span id="left"><</span>
<span id="right">></span>
<ul id="picNav">
<li class="active">1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ul>
<script>
var picNav=document.getElementById("picNav");
var picNavLis=picNav.getElementsByTagName("li");
var left=document.getElementById("left");
var rigth=document.getElementById("right");
var arr=["images/1.png","images/2.jpg","images/3.jpeg","images/4.jpeg","images/5.jpeg"];
var index=0;
var pic=document.getElementById("pic");
function change(){
if(index==4){
index=0;
}else{
index++;
}
pic.src=arr[index];
for(var n=0;n<picNavLis.length;n++){
picNavLis[n].className="";
}
picNavLis[index].className="active";
}
var t=setInterval(change,1000);
left.onclick=function(){
if(index==0){
index=4;
}else{
index--;
}
pic.src=arr[index];
for(var n=0;n<picNavLis.length;n++){
picNavLis[n].className="";
}
picNavLis[index].className="active";
}
right.onclick=function(){
if(index==4){
index=0;
}else{
index++;
}
pic.src=arr[index];
for(var n=0;n<picNavLis.length;n++){
picNavLis[n].className="";
}
picNavLis[index].className="active";
}
for(var n=0;n<picNavLis.length;n++){
picNavLis[n].index=n;
picNavLis[n].onmouseenter=function(){
for(var j=0;j<picNavLis.length;j++){
picNavLis[j].className="";
}
this.className="active";
index=this.index;
pic.src=arr[index];
}
}
pic.onmouseenter=function(){
clearInterval(t);
}
pic.onmouseleave=function(){
t=setInterval(change,1000);
}
left.onmouseenter=function(){
clearInterval(t);
}
left.onmouseleave=function(){
t=setInterval(change,2000);
}
right.onmouseenter=function(){
clearInterval(t);
}
right.onmouseleave=function(){
t=setInterval(change,2000);
}
picNav.onmouseenter=function(){
clearInterval(t);
}
picNav.onmouseleave=function(){
t=setInterval(change,2000);
}
</script>
</body>
</html>
