fmpq.com
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Fmpq教程(fmpq.com)</title> <script src="https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"> </script> <script> $(document).ready(function(){ $("input").focus(); $(":focus").css("background-color","yellow"); }); </script> </head> <body> <input type="text" /> </body> </html>
运行结果