AI 编程工具xxxxxxxxxx<html><head><meta charset="utf-8"> <title>高手教程(study.p2hp.com)</title><script src="https://cdn.staticfile.net/jquery/1.10.2/jquery.min.js"></script><script>$(document).ready(function(){ $(":enabled").css("background-color","red");});</script></head><body><form action=""> 用户名: <input type="text" name="user"><br> ID:<input type="text" name="id" disabled="disabled"> 年龄: <select disabled="disabled"> <option>20-30</option> <option>30-50</option> <option>50+</option> </select> <input type="submit"></form></body></html>