OO on js

   var DomesticChinaDeal = function(){};
   DomesticChinaDeal.prototype = {
     test: function() {
       alert("Hello World");
     }
   };
   DomesticChinaDeal.prototype.constructor = DomesticChinaDeal;

   var Factory = function(){};
   Factory.prototype = {
     getDeal : function() {
       return new DomesticChinaDeal();
     }
   };
   Factory.prototype.constructor = Factory;
    
   var deal = new Factory().getDeal();
   deal.test();