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> E-mail: <input type="email" id="myEmail" value="johndoe@example.com"> <p>点击按钮显示 email 字段的默认值。</p> <button onclick="myFunction()">尝试一下</button> <p><strong>注意：</strong> Internet Explorer 9 及更早 IE 版本，Safari 浏览器不支持 <input type="email"> 元素。</p> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myEmail").defaultValue; document.getElementById("demo").innerHTML = x; } </script> </body> </html>
运行结果