51help TIY
码：
<!DOCTYPE HTML> <html> <body> <form action="http://www.51help.tk/example/html5/demo_form.asp" method="get" id="user_form"> First name:<input type="text" name="fname" /> <input type="submit" /> </form> <p>域在 form 。</p> Last name: <input type="text" name="lname" form="user_form" /> </body> </html>
查看结果: