gistfile1.js

var klass = (function(){
  
  var k = {}
    , createObject = 
        typeof Object.create == "function" ?
        function(object){
          return Object.create(object)
        } : 
        function(object){
          function F(){}
          F.prototype = object
          return new F()
        }

  k.create = function(){
    var self = createObject(this)
    if(typeof self.constructor == "function") {
      self.constructor.apply(self, arguments)
    }
    return self
  }

  k.extend = function(){
    return createObject(this)
  }

  return k

})()