fmpq.com
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Fmpq教程(fmpq.com)</title> <script src="https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script> </head> <body> <script> $(function () { function funcontain( html ){ document.body.innerHTML += "<br>" + html; } funcontain($.contains( document.documentElement, document.body )); // true funcontain($.contains( document.body, document.documentElement )); // false }) </script> </body> </html>
运行结果