Simple Namespacing Method

gistfile1.js

var MYAPP = MYAPP || {};

MYAPP.namespace = function (ns_string) {
  
  var parts = ns_string.split('.'), 
  parent = MYAPP, i; 
  
  // strip redundant leading global 
  if( parts[0] === "MYAPP" ) { 
    parts = parts.slice(1); 
  } 
  
  for( i = 0; i < parts.length; i + = 1 ) { 
    // create a property if it doesn't exist 
    if( typeof parent[parts[i]] === "undefined" ) { 
      parent[parts[i]] = {}; 
    }
    parent = parent[parts[i]];
  } 
  
  return parent; 
};

//Stefanov, Stoyan (2010-09-09). JavaScript Patterns (Kindle Locations 2886-2892). OReilly Media - A. Kindle Edition.