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<!DOCTYPE html> <html> <body> <form id="myForm" action="/action_page.php"> <input type="radio" name="sex" id="male" value="male"> </form> <p>单击该按钮创建一个 LABEL 元素。</p> <button onclick="myFunction()">试一试</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>