Ajaxonline Final 042408

This document provides an overview of getting started with Ajax, including using the XMLHttpRequest (XHR) object to make asynchronous HTTP requests. It explains how to open a connection to a URL, set callback functions to handle the response, and send the request. Additional tips are provided on using XHR directly versus libraries, the HTTP protocol that Ajax utilizes, and browser compatibility issues. The full XHR object methods and properties are also listed.