Dynamic HTML (dHTML) is a markup language designed to heighten the interactive browsing experience.

Because dHTML can utilize each action of the user (a mouseclick, a rollover, a keystroke), it provides a rich and transparent way to process this data.

One of the powerful abilities of dHTML is to pass JavaScript through a browser as part of a form. For example, when a user checks a box within an HTML form, that click of the mouse can be the action that launches a new window to give or receive further data.