gistfile1.js

var Layout = (function() {
  /*
    TODO Maybe some default modules?
  */
  var modules = modules || {}; 
  
  function addModule(name, callback) {
    modules[name] = callback;
  }
  function applyJSON(json) {
    
    // Loop through the provided json response modules
    for(var module in json ) {
      if (json.hasOwnProperty(module)) {
        // Save the payload
        var data = json[module];
        // Pass payload to callback
        modules[module](data);
      }
    }
    // End xhr.
    Dispatcher.setXHR(null);
  }
  
  return { 
    addModule : addModule,
    applyJSON: applyJSON
  };
})();