手记

二级菜单显示与隐藏效果

<!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{ width:600px; height:40px; background-color:#eee; margin:0 auto;}

ul{ list-style:none;}
ul li{ float:left; line-height:40px; text-align:center; width: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 onmouseout="HideSub(this)"onmouseover="ShowSub(this)"><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>

2人推荐
随时随地看视频
慕课网APP