js图片自动轮播代码分享(js图片轮播)

时间：2021-05-26

1、利用图片width显示位置来播放图片，技术：.offsetWidth 、aBtn[i].index = i 、setInterval() 、oUl[0].style.left = 、onclick()
2、利用数组放入图片经行轮播，技术：setInterval()。没有onclick()

图片轮播12js.html
复制代码 代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>images slide</title>
<style type="text/css">
* {
margin: 0px;
padding: 0px;
}
li {
list-style: none;
}
img {
border: 0;
}
a {
text-decoration: none;
}
#slide {
width: 800px;
height: 400px;
box-shadow: 0px 0px 5px #c1c1c1;
margin: 20px auto;
position: relative;
overflow: hidden;
}
#slide ul {
position: absolute;
left: 0px;
top: 0px;
height: 400px;
width: 11930px;
}
#slide ul li {
width: 800px;
height: 400px;
overflow: hidden;
float: left;
}
#slide .ico {
width: 800px;
height: 20px;
overflow: hidden;
text-align: center;
position: absolute;
left: 0px;
bottom: 10px;
z-index: 1;
}
#slide .ico a {
display: inline-block;
width: 10px;
height:10px;
background: url(out.png) no-repeat 0px 0px;
margin: 0px 5px;
}
#slide .ico .active {
background: url(out1.png) no-repeat 0px 0px;
}
#btnLeft {
width: 60px;
height: 400px;
left: 0px;
top: 0px;
background: url() no-repeat 0px 0px;
position: absolute;
z-index: 2;
}
#btnLeft :hover {
background: url() no-repeat 0px 0px;
}
#btnRight {
width: 60px;
height: 400px;
right: 0px;
top: 0px;
background: url() no-repeat 0px 0px;
position: absolute;
z-index: 2;
}
#btnRight :hover {
background: url() no-repeat 0px 0px;
}

</style>

<script type="text/javascript">
window.onload = function() {
var oIco = document.getElementById("ico");
var aBtn = oIco.getElementsByTagName("a");
var oSlide = document.getElementById("slide");
var oUl = oSlide.getElementsByTagName("ul");
var aLi = oUl[0].getElementsByTagName("li");
var oBtnLeft = document.getElementById("btnLeft");
var oBtnRight = document.getElementById("btnRight");

var baseWidth = aLi[0].offsetWidth;
//alert(baseWidth);
oUl[0].style.width = baseWidth * aLi.length + "px";
var iNow = 0;
for(var i=0;i<aBtn.length;i++) {
aBtn[i].index = i;
aBtn[i].onclick = function() {
//alert(this.index);
//alert(oUl[0].style.left);
move(this.index);
//aIco[this.index].className = "active";
}
}
oBtnLeft.onclick = function() {
iNow ++;
//document.title = iNow;
move(iNow);
}
oBtnRight.onclick = function() {
iNow --;
document.title = iNow;
move(iNow);
}

var curIndex = 0;
var timeInterval = 1000;
setInterval(change,timeInterval);
function change() {
if(curIndex == aBtn.length) {
curIndex =0;
} else {
move(curIndex);
curIndex += 1;
}

}

function move(index) {
//document.title = index;
if(index>aLi.length-1) {
index = 0;
iNow = index;
}
if(index<0) {
index = aLi.length - 1;
iNow = index;
}
for(var n=0;n<aBtn.length;n++) {
aBtn[n].className = "";
}
aBtn[index].className = "active";
oUl[0].style.left = -index * baseWidth + "px";
//buffer(oUl[0],{
//left: -index * baseWidth
//},8)

}
}
</script>
</head>
<body>
<div id="slide">
<a id="btnLeft" href="javascript:void(0);" ></a>
<a id="btnRight" href="javascript:void(0);" ></a>
<!--when change next image:style="left: -(n-1)*800px;"-->
<ul>
<li><img src="1.jpg" alt="" /></li>
<li><img src="2.jpg" alt="" /></li>
<li><img src="3.jpg" alt="" /></li>
<li><img src="4.jpg" alt="" /></li>
<li><img src="5.jpg" alt="" /></li>
<li><img src="6.jpg" alt="" /></li>
</ul>
<div id="ico" class="ico">
<a class="active" href="javascript:void(0);"></a>
<a href="javascript:void(0);"></a>
<a href="javascript:void(0);"></a>
<a href="javascript:void(0);"></a>
<a href="javascript:void(0);"></a>
<a href="javascript:void(0);"></a>
</div>
</div>
</body>
</html>

图片自动播放.html
复制代码 代码如下:
<!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>
<script type="text/javascript">
var curIndex = 0;
var timeInterval = 1000;
var arr = new Array();
arr[0] = "1.jpg";
arr[1] = "2.jpg";
arr[2] = "3.jpg";
arr[3] = "4.jpg";
arr[4] = "5.jpg";
arr[5] = "6.jpg";
arr[6] = "7.jpg";
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>

<!-- <script language="javascript">
setInterval(test,1000);
var array = new Array();
var index = 0;
var array = new Array("image/1.jpg","image/2.jpg","image/3.jpg","image/4.jpg","image/5.jpg","image/6.jpg","image/7.jpg","image/8.jpg","image/9.jpg","image/10.jpg");
function test() {
var myimg=document.getElementById("imgs");
if(index==array.length-1)
{ index=0; }else{ index++; }
myimg.src=array[index];
}
</script> -->
</head>
<body>
<img id = "obj" src = "1.jpg" border = 0 />
</body>
</html>

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