jQuery插件的开发包括两种：

一种是类级别的插件开发，即给jQuery添加新的全局函数，相当于给jQuery类本身添加方法。jQuery

的全局函数就是属于jQuery命名空间的函数，另一种是对象级别的插件开发，即给jQuery对象添加方法。下

面就两种函数的开发做详细的说明。-jQuery plugin development, including two kinds: one is the class-level plug-in development, that is to jQuery to add a new global function, which is equivalent to the class itself, add the jQuery way. global function is part of the jQuery jQuery namespace function, the other is object-level plug-in development, that is, to add the jQuery object methods. Here two functions to do a detailed descr iption of the development.