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 txt="Hello World!"; document.write(txt.toLowerCase() + "<br>"); document.write(txt.toUpperCase()); </script> </body> </html>
运行结果