DHTML - the future power for HTML
Dynamic HTML (DHTML) provides richer multimedia in web pages with fewer and faster page downloads. Three core benefits of DHTML include:
Dynamic Styles - enables developers to change the appearance of content without forcing users to download all the content again
Dynamic Content - change the text or images that appear on a page so that content can respond interactively to user mouse and keyboard
Positioning - move text and images around a page either automatically or in response to user behavior
This all comes from the following: cascading style sheets (css), HTML 4.0, Document Object Model (DOM), and scripts