The document explains how to create an asynchronous XML HTTP request in JavaScript to retrieve data from a server. It includes code for initializing the request object, sending the request, and handling both text and XML responses, including parsing the data. Additionally, it provides a sample XML structure representing client data, as well as methods for extracting and displaying this information.

1. Ajax from Scratch Asychronous JavaScript XML Create the Response Content

2. Creating a XML Http Request Object

3. Assigning the onreadystatechange Method

4. Send the Http Header

5. Creating the Request Event Listener Method

6. Handling the Response Object Response Text innerHTML Response XML XML DOM

7. * Remove White Space Parse the XML DOM

8. Create Response Content <?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?> <!-- Document : clients.xml --> <root> <address_book> <clients> <client> <client_id> 1 </client_id> <first_name> Bradley </first_name> <middle_name> Lawrence </middle_name> <last_name> Bingham </last_name> </client> </clients> </address_book> </root>

9. Which XML Http Request Object Test for which standard to use IE7+, Firefox, Chrome, Opera, Safari window.XMLHttpRequest Microsoft Request Object window.ActiveXObject(“Microsoft.XMLHTTP)