objectId

gistfile1.js

var ObjectFactory = (function() {
  var map = {};
  var index = 0;
  return {
    create: function() {
      return this.register({});
    },
    register: function(object) {
      object.__id__ = (new Date()).getTime() + index++;
      map[id] = object;
      return object;
    },
    getObjectById: function(id) {
      return map[id];
    }
  };
})();