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Move your Web applications beyond the handicap of the ubiquitous thin client architecture. Today's browsers finally support advanced client-side interactions across all objects in an HTML document. Thanks to the Document Object Model (DOM), UI designers can now create interfaces that let users manipulate data in real time while still offering the conveniences of a Web application. Author Mike Padilla shows you how to implement code that exposes robust client-side functionality that is both clean and extensible.

While the Document Object Model (DOM) is perhaps best known in its role as a foundation for working with XML, variations on the theme actually started in browsers with HTML. Now DOM has come full circle as newer browsers implement the W3C Document Object Model through client-side scripting, such as JavaScript. This article looks at the JavaScript approach to DOM and chronicles the building of a Web page to which the user can add notes and edit note content.

With Cascading Style Sheets (CSS), page authors can control the appearance of content with more precision. CSS rules consist of a selector that determines the content to which the rule applies, and the properties and values that are set. While most developers are accustomed to using selectors that are based on tag names, CSS actually provides several different options that enable even greater control. This article discusses each type of selector and shows you how to use it.

This article takes a pragmatic look at XHTML, a markup language that effectively bridges the gap between the simplicity of HTML and the extensibility of XML. It also covers the essential features of the various flavors of XHTML and includes discussions of the language and a number of real-world applications.

To go beyond simple HTML, historically the only options have been to use Java technology or plug-ins. Now, you have a new way -- write and display applications natively in XML. The Mozilla platform provides such a mechanism. In this article, Nigel McFarlane introduces XUL (the XML User-interface Language). XUL is set of GUI widgets with extensive cross-platform support that are designed for building GUI elements for applications that have traditional, non-HTML GUIs.

Make no mistake, XML-RPC has its flaws, but this function invocation protocol is also well-suited to a variety of tasks. Here, columnist David Mertz examines XML-RPC as a way of modeling object data, and -- in response to reader feedback -- compares XML-RPC as a means of serializing objects with the xml_pickle module discussed in his earlier columns. Code samples illustrate this comparison in detail.

If you are just getting started and know about HTML, this is where you start. The basics are discussed here and we will make sure you get moving on to bigger and better things very quickly.