The component is the RequestHandler, to use it you have to set it on the controller, like this:
class ExamplesController extends AppController{ var $components = array('RequestHandler');and in the action we want to tell if it is an ajax call we have to set:
function myaction(){ $this->layout = $this->RequestHandler->isAjax()?'ajax':'default';so if it is an AJAX call the layaout that will be used is the ajax layout. By the way, this is a layout that comes with CakePHP, you don't need to create it. And you also can use any other layout you create.