简单教程
提交运行
代码编辑器:
<form id="myForm"> E-mail: <input type="email" id="myEmail"> </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>
运行结果: