1、
https://cloud.tencent.com/developer/article/1091944
2、
https://blog.csdn.net/qlwangcong518/article/details/84993471
3、
https://www.cnblogs.com/picaso/archive/2012/10/08/2715564.html
4、
表格前面增加序号
https://www.php.cn/js-tutorial-23565.html
原文：https://www.cnblogs.com/yaok430/p/11636019.html