function Base(){}
>undefined
Base.prototype.init = function() {
this.a='1';

}
>function () {
>this.a='1';
>
>}
Base.prototype.create = function(config) {
this.init(config);
return this;
}
>function (config) {
>this.init(config);
>return this;
>}
function Child(){}
>undefined
extend = function(Child, Parent)
    {
        var F = function() { };
        F.prototype = Parent.prototype;
        Child.prototype = new F();
        Child.prototype.constructor = Child;
        Child.super = Parent.prototype;
    };
>function (Child, Parent)
>   {
>        var F = function() { };
>        F.prototype = Parent.prototype;
>        Child.prototype = new F();
>        Child.prototype.constructor = Child;
>        Child.super = Parent.prototype;
>    }
extend(Child, Base)
>undefined
>Child.prototype
F
Child.super
>Base
function Child2(){}
>undefined
extend(Child2, Child)
>undefined
Child2
>function Child2(){}
Child2.super
>F
>constructor: function Child(){}
>__proto__: Base