原生JS实现轮播图
2018-09-14 本文已影响15人
puxiaotaoc
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title></title>
<style>
.banner{
width: 1002px;
height: auto;
overflow: hidden;
}
.banner img{
width: 1002px;
height: 300px;
overflow: hidden;
position: absolute;
background-repeat: no-repeat;
}
</style>
</head>
<body>
<div class="banner">
<ul>
<a href="#"><img src="photo_01.jpeg"></a>
<a href="#"><img src="photo_02.jpeg"></a>
<a href="#"><img src="photo_03.jpeg"></a>
<a href="#"><img src="photo_04.jpeg"></a>
</ul>
</div>
</body>
<script type="text/javascript">
var timer = null,
index = 0,
pics = document.getElementsByTagName("img");
function slideImg() {
var banner = document.getElementsByClassName("banner");
banner.onmouseover = function() {
stopAutoPlay();
}
banner.onmouseout = function() {
startAutoPlay();
}
banner.onmouseout();
}
//开始播放轮播图
function startAutoPlay() {
timer = setInterval(function() {
index++;
if (index > 3) {
index = 0;
}
changeImg();
}, 1000);
}
//暂停播放
function stopAutoPlay() {
if (timer) {
clearInterval(timer);
}
}
//改变轮播图
function changeImg() {
for (var i = 0; i < pics.length; i++) {
pics[i].style.display = "none";
}
pics[index].style.display = "block";
}
slideImg();
</script>
</html>
