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 id="myForm"> E-mail: <input id="myEmail" type="email"> </form> <p>点击按钮显示 email 字段所属的表单id。</p> <button onclick="myFunction()">点我</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myEmail").form.id; document.getElementById("demo").innerHTML = x; } </script> </body> </html>
运行结果