tryjsref_label_create 在线代码实例

 <form id="myForm" action="form_action.asp">
  <input type="radio" name="sex" id="male" value="male">
</form>

<p>点击按钮创建 LABEL 元素。</p>

<button onclick="myFunction()">尝试一下</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>