'Mastering CSS' An example of a drop-down menu_html/css

'Mastering CSS' An example of a drop-down menu_html/css_WEB-ITnose

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Release： 2016-06-24 11:53:19

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This example is for a drop-down menu. I made a few changes. The principle is indeed very simple, but the author's code hierarchy is very clear and worth learning. Another point is the author's colors during the interaction process. Changes, even precise changes between border lines, although it is basically invisible from the perspective of an onlooker, this kind of meticulous thinking and design is worth learning and thinking about, the so-called subtle prescription Whether the skills are mature or not, I think this makes sense! Without further ado, here’s the code:

  1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  2 <html xmlns="http://www.w3.org/1999/xhtml">  3 <head>  4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  5 <title>滑动门航条</title>  6 <style type="text/css">  7     *{margin:30 0;padding: 0;list-style: none;}  8     ul.main,ul.main ul{  9         float:left; 10         border:1px solid #486B02; 11         background-color:#8BD400; 12         } 13     ul.main li{ 14         float:left; 15         width:120px; 16         height:30px; 17         line-height:30px; 18         text-align:center; 19         } 20     ul.main li ul{ 21         width:120px; 22         position:absolute;left:-999em; 23         } 24     ul.main li:hover ul{ 25         left:auto;//AUTO时它会自动悬浮在下方 26         } 27     ul.main a{ 28         display:block; 29         color:#2B3F00; 30         border-left:1px solid #E4FFD3; 31         border-right:1px solid #486B02; 32         text-decoration:none; 33         } 34     ul.main li li a{ 35         border-top:1px solid #E4FFD3; 36         border-bottom:1px solid #486B02; 37         border-left:0; 38         border-right:0; 39         } 40     ul.main li:last-child a{ 41         border-bottom:0; 42         border-right:0; 43         } 44     ul a:hover,ul a:focus{ 45         color:#E4FFD3; 46         background-color:#6DA203; 47         } 48 </style> 49 </head> 50 <body> 51     <ul class="main"> 52         <li><a href="#" class="selected">首页</a></li> 53         <li><a href="#">教学</a> 54             <ul> 55                 <li><a href="#">本科生教学</a></li> 56                 <li><a href="#">研究生教学</a></li> 57                 <li><a href="#">中小学教学</a></li> 58                 <li><a href="#">远程教育</a></li> 59             </ul> 60         </li> 61         <li><a href="#">科研</a> 62             <ul> 63                 <li><a href="#">论文发表</a></li> 64                 <li><a href="#">实验室</a></li> 65                 <li><a href="#">产品展示</a></li> 66             </ul> 67         </li> 68         <li><a href="#">后勤</a> 69             <ul> 70                 <li><a href="#">规章制度</a></li> 71                 <li><a href="#">资料下载</a></li> 72                 <li><a href="#">设施开放时间</a></li> 73                 <li><a href="#">通知公告</a></li> 74             </ul> 75         </li> 76         <li><a href="#">安全保障</a> 77                <ul> 78                 <li><a href="#">保卫处</a></li> 79                 <li><a href="#">网上报警</a></li> 80                 <li><a href="#">案件公示</a></li> 81             </ul> 82         </li> 83         <li><a href="#">关于我们</a> 84                <ul> 85                 <li><a href="#">学校简介</a></li> 86                 <li><a href="#">校歌校徽</a></li> 87                 <li><a href="#">校内导航</a></li> 88                 <li><a href="#">学校历史</a></li> 89                 <li><a href="#">学校荣誉</a></li> 90             </ul> 91         </li> 92         <li><a href="#">联系我们</a> 93             <ul> 94                 <li><a href="#">写邮件</a></li> 95                 <li><a href="#">联系电话</a></li> 96                 <li><a href="#">校区地址</a></li> 97             </ul> 98         </li> 99     </ul>100 </body>101 </html>

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