The client object model contains the Xrm.Internal namespace. Use of the objects within this namespace are not supported. These objects, and any parts of the HTML Document Object Model (DOM), are subject to change without notice. We recommend that you do not use these functions or any script that depends on the DOM.
While debugging you may find methods and objects within the Xrm.Page or Xrm.Utility namespaces that are not documented. Only documented objects, functions, and methods are supported.