abstract：<!DOCTYPE html><html><head> <title>下滑线跟随导航</title> <script type="text/javascript" src="https://code.jquery.com/jquery-3.3.1.min.js"></script&
<!DOCTYPE html>
<html>
<head>
<title>下滑线跟随导航</title>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<style type="text/css">
*{margin:0;padding: 0}
ul {list-style: none;;z-index: 20;position: relative;font-size:15px;}
li { float: left; color:#fff; cursor:pointer; font-weight: bold;text-align: center; width:100px; line-height: 30px; }
.menu{width:500px; height: 32px; background: #af3434;border-radius: 3px; position: relative;margin:20px auto; box-shadow:0 2px 20px #000;}
</style>
</head>
<body>
<div class="menu">
<ul>
<li name="0">首页</li>
<li name="1">php中文网</li>
<li name="2">独孤九剑</li>
<li name="3">西门大官人</li>
<li name="4">灭绝师太</li>
</ul>
<div class="block" style="z-index:10;width:100px;height: 2px;background:#fff;position: absolute;top:30px;"></div>
<script type="text/javascript">
$(function(){
$('li').hover(
function(){
$x= parseInt($(this).attr('name'))*100; //解析一个字符串，返回int值;
$('.block').stop().animate({left:$x+'px'},200);
},
function(){
$('.block').stop().animate({left:$x+'px'},200);
}
)
})
</script>
</body>
</html>
Correcting teacher：查无此人Correction time：2019-05-07 09:48:00
Teacher's summary：完成的不错。css样式可以写到公用文件里，每次直接使用。继续加油。