DHTML

Dynamic HTML is a collective term for a combination of new Hypertext Markup Language (HTML) tags and options that will let you create Web pages more animated and more responsive to user interaction than previous versions of HTML. Much of dynamic HTML is specified in HTML 4.0. Simple examples of dynamic HTML pages would include having the color of a text heading change when a user passes a mouse over it or allowing a user to "drag and drop" an image to another place on a Web page. Dynamic HTML can allow Web documents to look and act like desktop applications or multimedia productions.

Reference: cesa8
This text is available under the terms GNU Free Documentation License.