javascript继承复写原型链函数的this._super()实现调用原函数（ES3版）

gistfile1.js

log = console.log;

var c = function(){};
c.create = function( Config ){
    var newFn = function(){
		//return newFn;
	};
	newFn.prototype = new c;
	var fn = c.prototype;
	for (var i in Config)
	{
		if ((typeof fn[i]) === "function"){//if repeat
			(function(item){
				var oldFn = Config[item];
				newFn.prototype[item] = function(){
					this._super = fn[item];
					oldFn.apply(this,arguments);
					//this._super = Config["_super"];
					delete this._super;
				}
			})(i);
		}else{
			newFn.prototype[i] = Config[i];
		}
	};
	return new newFn;
}
c.prototype = {
	say:function(){
		log("old say hello");
	},
	id:'ider',
};
var cc = c.create({
	say:function(){
		log("new say");
		this._super();
	},
	_super:function(){
		log("I'm super");
	}
});
cc.say();
cc._super();
log(cc.id);