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<!DOCTYPE html> <html> <body> <h3>如何访问 LABEL 元素的演示</h3> <label id="myLabel" for="male">男</label> <input type="radio" name="sex" id="male" value="male"><br> <p>点击按钮获取标签绑定的元素的id。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myLabel").htmlFor; document.getElementById("demo").innerHTML = x; } </script> </body> </html>