实例代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>学习实验课</title>
</head>
<style>
body{
background: url(images/0.jpg)no-repeat;
background-size:cover;
}
.box{
width:100%;
height:300px;
}
.inner_image{
width:1200px;
height:300px;
background:gray;
opacity:0.7;
margin:0 auto;
}
.inner_image img{
position: relative;
float:left;
width:200px;
height:200px;
border:2px solid yellow;
margin-left: 20px;
left:40px;
top:40px;
}
</style>
<body>
<div class="box">
<div class="inner_image">
<img src="images/0.jpg" alt="" id="img1"/>
<img src="images/1.jpg" alt="" id="img2"/>
<img src="images/2.jpg" alt="" id="img3"/>
<img src="images/3.jpg" alt="" id="img4" />
<img src="images/4.jpg" alt="" id="img5" />
</div>
</div>
<script>
window.onload=function(){
var image1=document.getElementById(‘img1‘);
var image2=document.getElementById(‘img2‘);
var image3=document.getElementById(‘img3‘);
var image4=document.getElementById(‘img4‘);
var image5=document.getElementById(‘img5‘);
image1.onclick=function(){
changeImg(0);
}
image2.onclick=function(){
changeImg(1);
}
image3.onclick=function(){
changeImg(2);
}
image4.onclick=function(){
changeImg(3);
}
image5.onclick=function(){
changeImg(4);
}
function changeImg(num){
document.body.style.backgroundImage="url(images/"+num+".jpg)";
}
}
</script>
</body>
</html>
时间： 2024-10-13 19:48:19