js实现简单的轮播图效果
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本文实例为大家分享了js实现简单的轮播图效果的具体代码，供大家参考，具体内容如下
代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<link rel="stylesheet" type="text/css" href="css/style.css" />
<style>
* {
margin: 0;
padding: 0;
}
.box {
width: 100%;
height: 500px;
border: 1px solid;
}
</style>
<script src="/UploadFiles/2021-04-02/new_file.js">
js:
window.onload = function() {
//banner 自动播放
var oBanner = document.getElementById('banner');
var aLi = oBanner.getElementsByTagName('li');
var oJumpBtn = document.getElementById('jumpBtn');
var aBtn = oJumpBtn.getElementsByTagName('li');
var oPreImg = document.getElementById('preImg');
var oNexImg = document.getElementById('nexImg');
var iNow = 0;
var timer = null;
for (var i = 0; i < aBtn.length; i++) {
aBtn[i].index = i;
aBtn[i].onclick = function() {
iNow = this.index;
tab();
};
}
function tab() {
for (var i = 0; i < aBtn.length; i++) {
aBtn[i].style.background = '#ccc';
aLi[i].style.opacity = 0;
}
aBtn[iNow].style.background = '#CF0F32';
aLi[iNow].style.opacity = 1;
}
function tick() {
iNow++;
if (iNow == aBtn.length) {
iNow = 0;
}
tab();
}
timer = setInterval(tick, 2000);
oPreImg.onclick = function() {
iNow--;
if (iNow < 0) {
iNow = aBtn.length - 1;
}
tab();
};
oNexImg.onclick = tick;
oBanner.onmouseover = function() {
clearInterval(timer);
};
oBanner.onmouseout = function() {
timer = setInterval(tick, 2000);
};
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
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