object

object.js

if(!window.MYNAMESPACE) window.MYNAMESPACE = {};

window.MYNAMESPACE.proxy = function(){
   var that, someSharedVariable;
   that = {};
   someSharedVariable = 10;

   that.doSomething = function(){
      callJqueryOrSomething();
      //use someSharedVariable;
   };

   that.doSomethingElse = function(a){
      callJqueryOrSomething();
      //use someSharedVariable, a;
   };   

   return that;
};

//usage
var caller = MYNAMESPACE.proxy();
caller.doSomething();
caller.doSomethingElse(20);