html/index3.html at master · wodesj33/html · GitHub

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
*{ margin:0px; padding:0px;}
 #menu{ background-color:#eee; width:600px; height:40px; margin:0 auto;}
 ul{ list-style:none;}
 ul li{ float:left; line-height:40px; text-align:center; position:relative; }
 a{ text-decoration:none; color:#000; display:block; width:90px;}
 a:hover{ color:#FFF; background-color:#666;}
 ul li ul li{ float:none;border-left:none;margin-top:2px; background-color:#eee; }
 ul li ul{width:90px; position:absolute;  left:0px; top:40px; display:none;}
</style>
<script type="text/javascript" src='./js/jquery-3.2.1.min.js' >
</script>
<script type="text/javascript">
        $(function(){
            $(".navmenu").mouseover(function (){
               $(this).children("ul").show();
            })
            $(".navmenu").mouseout(function (){
               $(this).children("ul").hide();
            })


        })
</script>

</head>

<body>
<div id="menu">
<ul>
  <li><a href="#">首页</a></li>
  <li class="navmenu"><a href="#">课程大厅</a>

    <ul>
        <li><a href="#">JavaScript</a></li>
        <li><a href="#">jQuery</a></li>
    </ul>

  </li>
  <li><a href="#">学习中心</a>
    <ul>
      <li><a href="#">视频学习</a></li>
      <li><a href="#">案例学习</a></li>
      <li><a href="#">交流平台</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>