<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<script src="https://libs.baidu.com/jquery/1.9.1/jquery.js"></script>
<title>Index</title>
</head>
<body>
<div id="nav">
<ul id="nav_ul">
<li data-id="n1">导航1</li>
<li data-id="n2">导航2</li>
<li data-id="n3">导航3</li>
<li data-id="n4">导航4</li>
<li data-id="n5">导航5</li>
</ul>
<div id="n1" class="nav_list none">
<ul>
<li>链接1</li>
<li>链接2</li>
<li>链接3</li>
<li>链接4</li>
<li>链接5</li>
</div>
<div id="n2" class="nav_list none">
<li>链接21</li>
<li>链接22</li>
<li>链接23</li>
<li>链接24</li>
<li>链接25</li>
<div id="n3" class="nav_list none">
<li>链接31</li>
<li>链接32</li>
<li>链接33</li>
<div id="n4" class="nav_list none">
<li>链接41</li>
<div id="n5" class="nav_list none">
<li>链接51</li>
</body>
</html>
输入 JavaScript 代码……
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#nav, .nav2 {
width: 590px;
height: 40px;
background-color: red;
position: relative;
}
.none {
display: none;
#nav_ul li {
display: inline-block;
line-height: 40px;
width: 80px;
text-align: center;
float: left;
font-size: 15px;
color: white;
font-weight: 400;
padding-left: 10px;
padding-right: 10px;
#nav li:hover {
cursor: pointer;
background-color: #8b0000;
color: #f5f5f5;
font-weight: 500;
.nav_list li {
display: block;
width: 100px;
.nav_list {
box-sizing: border-box;
height: auto;
#n1, #n2, #n3, #n4, #n5 {
position: absolute;
top: 24px;
#n1 {
left: 0;
#n2 {
left: 100px;
#n3 {
left: 200px;
#n4 {
left:300px;
#n5 {
left: 400px;