DHTML, or Dynamic HTML, is the result of combining HTML, CSS, and JavaScript: it uses scripts to dynamically modify the style — which may include the position and visibility — of document elements. In the W3C and the IE 4 DOMs, every document element has a style property that corresponds to the HTML style attribute that specifies inline styles. Instead of referring to a simple string, however, the style property refers to a Style object t....

The rest of this book contains a quick-reference for the core and client-side JavaScript APIs. It documents the complete core JavaScript API, covers the legacy (Level 0) DOM API, and presents a simplified view of the W3C Level 2 DOM API. Portions of that API not relevant to JavaScript programmers working with HTML documents have been omitted. The upper-right corner of the title block for each reference entry contains information that states whether a feature is part of the cor....

In 1994, an incredibly forward-thinking man named Rasmus Lerdorf developed a set of tools that used a parsing engine to interpret a few macros here and there. They were not extravagant: a guest book, a counter, and some other "home page" elements that were cool when the Web was in its infancy. He eventually combined these tools with a form interpretation (FI) package he had written, added some database support, and released what was known as PHP/FI.Then, in the spiri....

Every Window object has a document property that refers to a Document object. The Document object is arguably more important than the Window object itself: while the Window represents the browser window, the Document object represents the HTML document that is displayed in that window. The Document object has various properties that refer to other objects which allow access to and modification of document content. The way that document content is accessed and modified....

Netscape has defined a number of versions of JavaScript. Microsoft has released more-or-less compatible versions under the name "JScript," and the ECMA standards body has released three versions of a JavaScript standard named "ECMAScript". The following paragraphs describe these various versions, and explain how they relate to each other. Each entry in the reference section contains availability information that documents the version of JavaScript in which ....