飞飞input表单输入框默认提示信息插件是为输入用户名的提示信息而写的。功能虽然简单但对于做开发的人来说每次写这几行代码也实属繁琐，所以我就把这几行代码写成了jquery的插件以求以后用起来更加便捷。-Feifei input form inputs for the plug-in is the default prompt to enter a user name and a message written. Function is simple but for those who do develop each write these few lines of code it is too complicated, so I ll put a few lines of code written in jquery plugins later in order to use them more convenient.