• JS控制显示/隐藏二级菜单


    <!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;}
    body{ font-family:Verdana, Geneva, sans-serif; font-size:14px;}
    #nav{ 600px; height:40px; background-color:#eee; margin:0 auto;}
    ul{ list-style:none;}
    ul li{ float:left; line-height:40px; text-align:center; 100px;}
    a{ text-decoration:none; color:#000; display:block;}
    a:hover{ color:#F00; background-color:#666;}
    ul li ul li{ float:none;background-color:#eee; margin:2px 0px;}
    ul li ul{ display:none; }
    </style>
     <script type="text/javascript">
            function ShowSub(li) {
                var subMenu =  li.getElementsByTagName("ul")[0]  ;
                subMenu.style.display = "block";
            }

            function HideSub(li) {
                var subMenu = li.getElementsByTagName("ul")[0];
                subMenu.style.display = "none";
            }

        </script>
    </head>

    <body>
    <div id="nav">
    <ul>
      <li><a href="#">首页</a></li>
      <li onmouseover='ShowSub(this)' onmouseout='HideSub(this)'  ><a href="#">课程大厅</a>
         <ul>
             <li><a href="#">JavaScript</a></li>
             <li><a href="#">Html/CSS</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="#">实例练习</a></li>
             <li><a href="#">问与答</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>

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  • 原文地址:https://www.cnblogs.com/LuoEast/p/8660880.html
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