Example Pattern Registry

registry.js

 function Registry(){
   if(!this.instance){
     /* object not yet created */
       function registry(){  }
       /* bunch of hashes for the passed object */
       registry.prototype.reg = {}
       /* method to add objects */
       registry.prototype.add = function(name, object){
          this.reg[name] = object;
       }
       /* method to obtain an object */
       registry.prototype.get = function (name){
          return this.reg[name];
       }

      this.instance = new registry();
   }
 return this.instance;
 }

 Registry().add('test', 3);
 alert(Registry().get('test'));