abstract：<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>下划线跟随导航</title>
<script type="text/javascript" src="jque
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>下划线跟随导航</title>
<script type="text/javascript" src="jquery-3.3.1.min.js"></script>
<style type="text/css">
*{padding:0;margin: 0}
ul{list-style:none;z-index: 20;position: relative;font-size: 15px;}
li{float: left;cursor: pointer;width: 100px;height: 30px;text-align: center;line-height: 30px;color: #fff;font-weight: bold}
.menu{width: 500px;position: relative;margin: 20px auto;height: 32px;box-shadow: 0 2px 20px #000;background: #AF3434;border-radius:3px;}
</style>
<script type="text/javascript">
$(function(){
$('li').hover(
function(){
var $a = $(this).index()*100;
// alert(a);
// $x = parseInt($(this).attr('name'))*100;
$('.block').stop().animate({'left':$a+'px'},500)
},function(){
$('.block').stop().animate({'left':'0px'},500)
}
)
})
</script>
</head>
<body>
<div>
<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 style="z-index:10;width:100px;height:2px;background:#fff;position:absolute;top:30px;"></div>
</div>
</body>
</html>
