实现JavaScript类继承(inherits)

简单实现了个JavaScript类继承（比下午在公司实现的要简单得多），继承prototype方法和静态方法，实际使用过程中mix函数还需要丰满一下。这东西水很深，自己也一知半解的，不多说直接放代码。

Function.prototype.method = function(name,fn){
	this.prototype[name] = fn;
	return this;
}
Function.method('inherits',(function(){
	function mix(a,b){
		for(var i in b){
			//replace
			if(typeof a[i] == 'undefined'){
				a[i] = b[i];
			} 
		}
	}
	return function(Parent){
		var fn = function(){};
		mix(this.prototype,Parent.prototype);
		mix(this,Parent);
		this.__super__ = Parent;
		//static method
		//object.__super__.demo
 
		//prototype method
		//object.__super__.prototype.hidden
	  return this;
	};
})());
 
 
var a = function(){};
var b = function(){};
var c = function(){};
var d = function(){};
a.prototype.show = function(){
	console.log('a show');
};
b.prototype.hidden = function(){
	console.log('b hidden');
};
a.test = function(){
	console.log('a test');
};
b.demo = function(){
	console.log('b demo');
};
 
//usage
b.inherits(a);
c.inherits(a);
d.inherits(b);

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