BootWiki教程网
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>BootWiki 教程网</title> </head> <body> <form action="demo-form.php"> 电话号码: <input name="usrtel" type="tel"><br> <input type="submit"> </form> </body> </html>
运行结果