<!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" />
<script src="new/js/jquery-3.2.1.min.js" type="text/javascript"></script>
<!--以上script是导入的jquery文件-->
<title>无标题文档</title>
<!-- 此处样式可以看成是外部一个.css里面的内容，用法一样-->
<style type="text/css">
.mainnav{ background:#292929; height:43px; margin-top:1px; margin-bottom:10px;}
.mainnav ul{}
.mainnav ul li{ float:left; display:inline; right no-repeat; padding-right:2px;}
.mainnav ul li a{ display:inline-block; height:43px; line-height:43px; padding:0 23px; font-size:14px; color:#fff; font-weight:bold;}
.mainnav ul li a:hover{ text-decoration:none; color:#e87717;}
.mainnav ul li.on a{ color:#e87717;} </style>
</head>
<body>
<div class="mainnav">
<ul>
<li class="on"><a href="#">首页</a></li>
<li><a href="#">主页</a></li>
<li><a href="#">足球</a></li>
<li><a href="#">篮球</a></li>
<li><a href="#">台球</a></li>
</ul>
</div>
<script type="text/javascript">
$(document).ready(function () {
$('li').bind('click',function(){
$(this).addClass('on');
$('li').not($(this)).removeClass('on');
});
});
</script>
</body>
</html>