<!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=utf-8" />
<title>images</title>
<style type="text/css">
.bannerzmm{
width: 55%;
margin:0 auto;
height: 400px;
border: 2px solid red;
}
.bannerzmm img{
width: 100%;
height: 100%;
}
</style>
<script type="text/javascript">
var curIndex = 0;
var timeInterval = 2000;
var arr = new Array();
arr[0] = "images/b1.png";
arr[1] = "images/b2.png";
arr[2] = "images/b3.png";
setInterval(changeImg,timeInterval);
function changeImg() {
var obj = document.getElementById("obj");
if (curIndex == arr.length-1) {
curIndex = 0;
} else {
curIndex += 1;
}
obj.src = arr[curIndex];
}
</script>
</head>
<body>
<div class="bannerzmm">
<img id = "obj" src = "images/b1.png" border = 0 />
</div>
</body>
</html>
来源：https://www.cnblogs.com/manzai520/p/8136313.html