Developing successful web pages these days involves more than simply pumping
out HTML tags. Ever-evolving towards a true development environment, complex
web pages now grow out of a coalition of technologies, including Cascading Style
Sheets, JavaScript (both loosely referred to as "Dynamic HTML"), and
possibly even XML. Consequently, web pages are complex organisms, far more advanced
than their protozoan ancestors. Working with such an organism requires a thorough
insight into its anatomy, and that is the basis and purpose for the Document
Object Model. In this discussion we'll look closely at the "DOM,"
as it is known -- what it is, how you use it, and where it might be leading
us. The DOM is a Web programmer's ally, but as such, we must assume some Web
programming experience. This article is not a tutorial on JavaScript syntax
or Dynamic HTML; however, if you have developed in either of the above to even
a small extent, you will certainly be interested in understanding the DOM, even
if you haven't heard of it until now.