自己构造构造函数

/**
 * @description 扩展function的原型
 * @function
 * @obj this的上下文
 */


if(!Function.prototype.bind){
	Function.prototype.bind = function(obj){
		var slice = [].slice,
			args = slice.call(arguments,1),
			self = this,
			nop = function(){},
			bound = function(){
				return self.apply(this instanceof nop ? this : (obj || {}),args.concat(slice.call(arguments)))
			}

		nop.prototype = self.prototype;

		bound.prototype = new nop();

		return bound
	}
}

/**
 * @description Class 构造函数
 * @function
 * @public
 */

var Class = function(parent){
	var Klass = function(){
		this.init.apply(this,arguments)
	}
	
	/* 
		@init method
	*/
	Klass.prototype.init = function(){}

	Klass.fn = Klass.prototype

	/*
	 * @ description 继承
	 * @ function
	 * @ public
	 * @ params {Object} 父元素
	 * 
	 */
	
	if(parent){
		var subClass = function(){}
		subClass.prototype = parent;
		Klass.fn = new subClass();
	}

	/*
	 * @ description 保持上下文
	 * @ function
	 * @ public
	 */
	Klass.proxy = function(func){
		var self = this;
		return (function(){
			func.apply(self,arguments)
		})
	}

	/*
	 * @ description 
	 */
	Klass.extend = function(obj){
		var extend = obj.extend
		for(var i in obj){
			if(obj.hasOwnProperty(i)){
				Klass[i] = obj[i]
			}
		}
		extend && extend(Klass)
	}

	Klass.include = function(obj){
		var included = obj.included
		for(var i in obj){
			if(obj.hasOwnProperty(i)){
				Klass.fn[i] = obj[i]
			}
		}
		included && included(Klass)
	}


	Klass.fn.proxy = Klass.proxy;

	return Klass

}

/*
	创建实例 Button
 */
var Button = new Class();
Button.include({
	init : function(element){
		this.element = $(‘#aa‘)
		this.element.click(this.proxy(this.click))
	}, 
	click : function(){}
})