<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<script src="js/jquery-3.4.1.min.js"></script>
<title>三级菜单</title>
<script>
$(function () {
$(".top-nav li").mousemove(function () {
$(this).children("ul").slideDown("1000");
})
$(".top-nav li").mouseleave(function () {
$(this).children("ul").slideUp("slow");
})
});
</script>
<style>
a {
color: #FFFF99;
text-decoration: none;
}
.top-nav {
font-size: 16px;
font-weight: bold;
/* 去小圆点 */
list-style: none;
}
.top-nav li {
float: left;
/* 每个菜单之间有1像素间距 */
margin-right: 1px;
}
/* 二级菜单 */
.top-nav li ul {
display: none;
/* 去圆点 */
list-style: none;
padding: 0px;
position: absolute;
float: left;
}
.top-nav li a {
line-height: 34px;
text-decoration: none;
background: #DDDDDD;
color: #666666;
display: block;
width: 80px;
text-align: center;
}
.top-nav li a:hover {
background: url("images/slide-bg.PNG") repeat-x;
}
.top-nav li:hover ul {
display: block;
}
.note {
display: block;
color: #3f240e;
background: url("images/slide-bg.PNG") repeat-x;
}
.corner {
display: block;
height: 18px;
background: url("images/corner.PNG") 27px 0 no-repeat;
}
</style>
</head>
<body>
<div id="top">
<ul class="top-nav">
<li><a href="#"><span class="note">首页</span></a></li>
<li><a href="#">课程大厅</a></li>
<li><a href="#">学习中心</a>
<ul>
<span class="corner"></span>
<li><a href="#">前端课程</a></li>
<li><a href="#">后端课程</a></li>
<li><a href="#">移动开发</a></li>
</ul>
</li>
<li><a href="#">经典案例</a></li>
<li><a href="#">关于我们</a></li>
</ul>
</div>
</body>
</html>
