To understand how AJAX works, we will create a small AJAX application:
The AJAX application above contains one div section and one button.
The div section will be used to display information returned from a server. The button calls a function named loadXMLDoc(), if it is clicked:
Next, add a <script> tag to the page's head section. The script section contains the loadXMLDoc() function:
The next chapters will explain how AJAX works.