W3School TIY
编辑您的代码：
<!DOCTYPE html> <html> <body> <h3>演示如何访问 LABEL 元素</h3> <form id="myForm" action="http://w3c.80zhan.com/tiy/form_action.asp"> <input type="radio" name="sex" id="male" value="male"> </form> <p>点击按钮来创建 LABEL 元素。</p> <button onclick="myFunction()">试一下</button> <script> function myFunction() { var x = document.createElement("LABEL"); var t = document.createTextNode("Male"); x.setAttribute("for", "male"); x.appendChild(t); document.getElementById("myForm").insertBefore(x,document.getElementById("male")); } </script> </body> </html>
查看结果: