摘要：
<html> <head> <meta charset="UTF-8"> <title></title> <script src="js/jquery-3.4.1.js" type="text/javascript" charset="utf-8"></script> <script type="t 阅读全文
摘要：
<html> <head> <meta charset="UTF-8"> <title></title> <script type="text/javascript"> function changes (v) { //定义城市的数组 var citys=[ ["郑州","洛阳","新乡","驻马店 阅读全文