BootWiki教程网
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>BootWiki 教程网</title> <script src="//cdn.staticfile.net/jquery/1.10.2/jquery.min.js"></script> <script> $(document).ready(function(){ $("input").focus(function(){ $("span").css("display","inline").fadeOut(2000); }); }); </script> <style> span { display:none; } </style> </head> <body> <input> <span>请输入你的电话号码?</span> <p>点击输入框获取焦点。</p> </body> </html>
运行结果