A simple introduction to Ajax

This picture is an simplified introduction about how Ajax works:



The user send a request that executes an action and the action's response is showed into a layer, identify by and ID, without reload the full page. For ex a layer with this id:

<div id="ajaxResponse"></div>

In the next lessons we will see how to create an XMLHttpRequest and some actions (login, modify data, insert data into a database table, load pages into a page layer...).