Dynamic HTML. A modern form of HTML, extended with JavaScript, that provides a degree of interactivity in zero footprint solutions where no code need be installed on the client. Requires a modern browser. Gaining in popularity for Internet OLAP deployments, but often incurs serious performance penalties. Dynamic HTML is often used to make rollover or drop-down buttons on a web page. Often due to browser incompatiblity issues, DHTML is more and more replaced with JavaScript coding.