User Annotations in Ajax  

The ability to add notes and comments to your Web site can be a powerful and attractive feature for users. This tutorial demonstrates how to implement an Asynchronous JavaScript and XML (AJAX)-based user annotation system in the form of yellow sticky notes that sit on top of regular Web page content. The only additional, required configuration is a back-end Perl script that stores the annotations.

Travis, Greg. IBM (2006). Articles>Web Design>DHTML>Ajax

Creating Modular Interactive User Interfaces with JavaScript

Discover a technique that lets you move sections of a Web page using drag-and-drop functions. Different aspects of the interactivity are implemented separately and then composed into a unified whole, allowing for flexible customization that can make your Web users very happy.

Travis, Greg. IBM (2008). Articles>Web Design>Interaction Design>JavaScript