Summary

In this lesson, we constructed a simple yet complete Ajax application that does the following:

• Creates an instance of the XMLHTTPRequest object

• Reacts to JavaScript event handlers built into an HTML page

• Constructs and sends asynchronous server requests

• Parses XML received from the server using JavaScript DOM methods

• Provides user feedback that a request is in progress

• Updates the displayed page with the received data

This completes Part II of the book. Part III, "More Complex Ajax Technologies," investigates some more advanced Ajax techniques.