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.

One of the advantages of PHP has always been the ability to easily manipulate information submitted by the user through an HTML form. In fact, PHP version 4.1 adds several new ways to access this information and effectively removes the one most commonly used in previous versions. This article looks at different ways to use the information submitted on an HTML form, in both older and more recent versions of PHP. It starts out by looking at individual values and builds to a page that can generically access any available form values.