菜鸟教程在线编辑器

AI 编程工具
 
                <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body>

<form id="runoob-form">
<textarea id="myTextarea">
Runoob</textarea>
</form>

<p>点击按钮查看 textarea 所属的表单 id。</p>

<button type="button" onclick="myFunction()">点我</button>

<p id="demo"></p>

<script>
function myFunction() {
  var x = document.getElementById("myTextarea").form.id;
  document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>
              