fmpq.com
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Fmpq教程(fmpq.com)</title> </head> <body> <script> var str="Visit W3Cschool.\n Learn JavaScript."; var patt1=/\n/g; document.write(str.search(patt1)); </script> </body> </html>
运行结果