Prototype NodeList Object.js

// Prototype object that works a lot like jQuery:
var NodeList = Class.create(Enumerable);
Object.extend(NodeList.prototype, {
  initialize: function(selector) {
    this.elements = $$(selector);
  },
  _each: function(iterator) {
    this.elements.each(iterator);
    return this;
  }
});

for (var methodName in Element.Methods) {
  NodeList.prototype[methodName] = (function(methodName) {
    return function() {
      var args = Array.prototype.slice.call(arguments, 0);
      this.elements.each(function(element) {
        element[methodName].apply(element, args);
      });
      return this;
    };
  })(methodName);
}
// example usage
new NodeList('li').hide()