abstract：<!DOCTYPE html><html><head><meta charset="UTF-8"><title>三级菜单</title><script type="text/javascript" src="jquery-3.3.1.js"></sc
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>三级菜单</title>
<script type="text/javascript" src="jquery-3.3.1.js"></script>
<style>
*{ margin: 0px;
padding: 0px;
}
body{
background-color: #ccc;
}
.box{
width: 100%;
height: 40px;
background-color: #F92672;
border-radius: 3px;
box-shadow: 0px 0px 15px;
margin-top: 10px;
}
.nav{
width: 500px;
height: 40px;
margin: 0px auto;
}
ul li{
width: 100px;
height: 38px;
box-shadow: 5px;
text-align: center;
float: left;
list-style: none;
line-height: 40px;
font-weight: bold;
color: #fff;
cursor: pointer;
}
.twobox li{
background-color: #F92672;
border:0.5px solid #fff;
border-top: 0px;
color: #ccc;
font-size: 14px;
height: 35px;
}
.twobox{
/*top:40px;*/
border-top:0.5px solid #fff;
}
ul{
position: absolute;
z-index: 20;
}
.block{
width: 100px;
height: 2px;
background-color: #fff;
top: 38px;
z-index: 10;
position: relative;
border-radius: 5px;
}
.three li{
background-color: #F92672;
border-top: 0px;
color: #ccc;
font-size: 14px;
position: relative;
border-top:0.5px solid #fff;
}
.three{
margin-top: -40px;
left: 101px;
}
.twobox li:hover {
background: #ccc;
color: #fff;}
</style>
</head>
<body>
<div>
<div>
<ul>
<li name="0">首页</li>
<li name="1">php中文网</li>
<li name="2">独孤九剑</li>
<li name="3">西门大官人</li>
<li name="4">灭绝师太
<ul>
<li>web前端
<ul>
<li>html</li>
<li>javascript</li>
<li>css</li>
</ul>
</li>
<li>PHP后台</li>
<li>thinkphp</li>
</ul>
</li>
</ul>
<div></div>
</div>
</div>
</body>
<script type="text/javascript">
$(document).ready(function(){
$(".twobox").hide()
$(".three").hide()
$(".one>li").mouseover(function(){
$(this).find(".twobox").slideDown(500)
})
$(".one>li").mouseleave(function(){
$(this).find(".twobox").slideUp(500)
})
$(".two").mouseover(function(){
$(this).find(".three").slideDown(500)
})
$(".two").mouseleave(function(){
$(this).find(".three").slideUp(500)
})
$("li").hover(function(){
$x=parseInt($(this).attr("name"))*100
$(".block").mouseover().animate({left:$x+"px"},200)
})
})
</script>
</html>
Correcting teacher：查无此人Correction time：2018-11-25 09:51:28
Teacher's summary：老师课程里有带着大家做。教你个最简单的，用对比软件，对比下，看看哪里缺少了。