Simple js class library

gistfile1.js

(function(exports) {

    var Class = function(parent) {
        var klass = function() {
            this.init.apply(this, arguments);
        };

        if(parent) {
            var subclass = function(){};
            subclass.prototype = parent.prototype;
            klass.prototype = new subclass;
        }
        klass.prototype.init = function(){};
        klass.fn = klass.prototype;
        klass.fn.parent = klass;
        klass._super = klass.__proto__;

        klass.proxy  = function(func) {
            var self = this;
            return (function() {
                func.apply(self, arguments);
            });
        };
        klass.fn.proxy = klass.proxy;

        klass.extend = function(obj) {
            var extended = obj.extended;
            for(i in obj) {
                klass[i] = obj[i];
            }
            if(extended) extended(klass);
        };

        klass.include = function(obj) {
            var included = obj.included;
            for(i in obj) {
                klass.fn[i] = obj[i];
            }
            if(included) included(klass);
        };

        return klass;
    };
    exports.Class = Class;
})(window);