<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Document</title>
<style>
*{
margin: 0;
padding: 0;
list-style: none;
text-decoration: none;
}
.wrap{
width: 676px;
height: 450px;
overflow: hidden;
background: black;
}
.wrap ul li{
height: 220px;
float: left;
border: 2px solid black;
}
.wrap img{
border: 0;
display: block;
}
</style>
<script src="js\jquery-3.3.1.min.js"></script>
</head>
<body>
<div class="wrap">
<ul>
<li>
<a href="#"><img src="img/1.png" alt=""></a>
</li>
<li>
<a href="#"><img src="img/2.png" alt=""></a>
</li>
<li>
<a href="#"><img src="img/3.png" alt=""></a>
</li>
<li>
<a href="#"><img src="img/4.png" alt=""></a>
</li>
<li>
<a href="#"><img src="img/5.png" alt=""></a>
</li>
<li>
<a href="#"><img src="img/6.png" alt=""></a>
</li>
</ul>
</div>
<script>
$(function(){
//鼠标进入时，其他的li标签透明度为0.5
$(".wrap li").hover(function(){
$(this).siblings().stop().fadeTo(400,0.5);
},function(){
//鼠标离开，其他li 透明度改为1
$(this).siblings().stop().fadeTo(400,1);
})
})
</script>
</body>
</html>
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