51help TIY
码：
<!DOCTYPE HTML> <html> <body> <form action="http://www.51help.tk/example/html5/demo_form.asp" method="get"> Email: <input type="text" name="email" /><br /> <input type="hidden" name="country" value="China" /> <input type="submit" value="提交" /> </form> </body> </html>
查看结果: