fmpq.com
源代码:
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Fmpq教程(fmpq.com)</title> </head> <body> <form> <label id="myLabel" for="male">Male</label> <input type="radio" name="sex" id="male" value="male"><br> </form> <p>点击“尝试一下”按钮改变 label 的 for 属性的值。</p> <p id="demo"></p> <button onclick="myFunction()">尝试一下</button> <script> function myFunction(){ document.getElementById("myLabel").htmlFor="newValue"; document.getElementById("demo").innerHTML="for 属性的值从 'male' 改为 'newValue'。"; } </script> </body> </html>
运行结果