Inheritance (Javascript Version)

var module, moduleKeywords,
  indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };

moduleKeywords = ['extended,included'];

module = (function() {
  function module() {}

  module.extend = function(obj) {
    var key, ref, value;
    for (key in obj) {
      value = obj[key];
      if (indexOf.call(moduleKeywords, key) < 0) {
        this[key] = value;
      }
    }
    if ((ref = obj.extended) != null) {
      ref.apply(this);
    }
    return this;
  };

  module.include = function(obj) {
    var key, ref, value;
    for (key in obj) {
      value = obj[key];
      if (indexOf.call(moduleKeywords, key) < 0) {
        this.prototype[key] = value;
      }
    }
    if ((ref = obj.included) != null) {
      ref.apply(this);
    }
    return this;
  };

  return module;

})();