功能：图片轮播，当鼠标移入图片、圆点和方向键时，停止轮播，移除恢复。
1.首先建立div，并放入图片
css;">
#wai{
width:300px;
height: 300px;
border: 1px solid red;
}
img{
width: 100%;
height: 100%;
display: none;
}
<div id="wai" onmouseover="qing()" onmouseout="hui()">
<img src="timg.jpg"/style="display: block;">
<img src="timg1.jpg"/>
<img src="timg2.jpg"/>
<img src="timg3.jpg"/>
</div>
2.添加4个圆点和左右方向
<!--四个点的div--> <div id="dianbox"> <div class="dian" style="border-color: green;" onclick="yuan(this,'0')" onmouseover="qing()" onmouseout="hui()"> </div> <div class="dian" onclick="yuan(this,'1')" onmouseover="qing()" onmouseout="hui()"> </div> <div class="dian" onclick="yuan(this,'2')" onmouseover="qing()" onmouseout="hui()"> </div> <div class="dian" onclick="yuan(this,'3')" onmouseover="qing()" onmouseout="hui()"> </div> </div>
<!--左箭头div--> <div id="lbox" onclick="zuoyou(-1)" onmouseover="qing()" onmouseout="hui()"> <br> <div id="l"> </div> </div>
<!--右箭头div--> <div id="lbox" onclick="zuoyou(-1)" onmouseover="qing()" onmouseout="hui()"> <br> <div id="l"> </div> </div>
3.写js
先定义计时器、写清除计时器函数和恢复计时器函数
定义计时器
var timer = setInterval("lun()",2000);
清除计时器函数
function qing(){
window.clearInterval(timer);
}
恢复计时器函数
function hui(){
timer = setInterval("lun()",2000);
}
写轮播函数并且换图时圆点变色
function lun(){
// 图片轮播
bs++;
var img = document.getElementsByTagName("img");
if(bs>= img.length){
bs=0;
}
for (i = 0;i<img.length;i++) {
img[i].style.display="none";
}
img[bs].style.display="block";
// 圆点变色
var dian = document.getElementsByClassName("dian");
for (j = 0;j < img.length;j++) {
dian[j].style.borderColor="red";
}
dian[bs].style.borderColor="green";
}
鼠标点击圆点实现圆点变色并切换到相应图片
//点圆换图清除定时器
function yuan(x,y){
bs=y;
var img = document.getElementsByTagName("img");
for(i = 0;i<img.length;i++){
img[i].style.display="none";
}
img[y].style.display="block";
var dian = document.getElementsByClassName("dian");
for (j = 0;j<dian.length;j++) {
dian[j].style.borderColor="red";
}
x.style.borderColor="green";
}
鼠标点击方向实现切换到上一张或下一张图片并实现圆点的变化
function zuoyou(z){
bs=bs+z;
if(bs==4){
bs=0;
}
if(bs<0){
bs=3;
}
var img = document.getElementsByTagName("img");
for(i = 0;i<img.length;i++){
img[i].style.display="none";
}
img[bs].style.display="block";
var dian = document.getElementsByClassName("dian");
for (j=0;j<dian.length;j++) {
dian[j].style.borderColor="red";
}
dian[bs].style.borderColor="green";
}
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。
