RUNOOB.COM
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>电脑学习网教程(runoob.com)</title> </head> <body> <form action="demo-form.php" method="get"> <input type="radio" name="sex" value="Male"> Male<br> <input type="radio" name="sex" value="Female" checked="checked"> Female<br> <input type="submit" value="提交"> </form> </body> </html>
运行结果