JavaScript Inheritance

oop.js

var Base = {
  create: function(attrs){
		var o=this.clone();
		o.init(attrs);
		return o;
	},
	clone: function() {
		var o={};
		for(var i in this)
			if (this.hasOwnProperty(i))
				o[i] = this[i];
		o.constructor.prototype=this;
		return o;
	},
	init: function(attrs) {
		for(var i in attrs)
			if (attrs.hasOwnProperty(i))
				this[i] = attrs[i];
	},
	extend: function(attrs) {
		var o = this.clone();
		for(var i in attrs)
			if (attrs.hasOwnProperty(i))
				o[i] = attrs[i];
		return o;
	}
}, Person = Base.extend({name:'', age: 0});