1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 5 <title>最简单的菜单</title> 6 <style> 7 *{margin: 0;padding: 0;} 8 .moyu ul a{font-family: '微软雅黑';font-size: 14px;color: #333;text-decoration: none;} 9 .moyu ul a:hover{color: #000;text-decoration: none;}10 .moyu ul li{width: 100px;height: 35px;line-height: 35px;text-align: center;position: relative;}11 .moyu ul li:hover{background: #c1c1c1;}12 .moyu ul{width: 100px;height: auto;position: absolute;background: #DADADA;list-style: none;}13 14 .moyu ul.nav2{left: 99px;top: 0;display: none;}15 .moyu ul.nav3{left: 99px;top: 0;display: none;}16 .moyu .nav1 .li1:hover ul.nav2{display: block;background: #c1c1c1;}17 .moyu .nav2 .li2:hover ul.nav3{display: block;background: #c1c1c1;}18 .moyu .nav2 ,.moyu .nav2 li:hover {background:#ccc;}19 </style>20 </head>21 <body>22 <!--代码部分begin-->23 <div class="moyu">24 <ul class="nav1">25 <li class="li1"><a href="#">一级导航</a>26 <ul class="nav2">27 <li class="li2"><a href="#">二级导航</a></li>28 <li class="li2"><a href="#">二级导航</a>29 <ul class="nav3">30 <li class="li3"><a href="#">三级导航</a></li>31 <li class="li3"><a href="#">三级导航</a></li>32 <li class="li3"><a href="#">三级导航</a></li>33 <li class="li3"><a href="#">三级导航</a></li>34 </ul>35 </li>36 <li class="li2"><a href="#">二级导航</a></li>37 <li class="li2"><a href="#">二级导航</a></li>38 </ul>39 </li>40 <li class="li1"><a href="#">一级导航</a></li>41 <li class="li1"><a href="#">一级导航</a></li>42 <li class="li1"><a href="#">一级导航</a></li>43 <li class="li1"><a href="#">一级导航</a></li>44 <li class="li1"><a href="#">一级导航</a></li>45 </ul>46 </div>47 <!--代码部分end-->48 </body>49 </html>
The above code can easily understand the concept of menu.
The menu is the opening (display:block;) and closing (display:hidden;) of the small box in the box
The idea is the same, but the implementation method is different. It can be written in pure CSS , JavaScript and jQuery can also be used. Or more complex plug-ins bootstrap, jQuery UI, etc.