"One reason dynamic HTML (dHTML) is called dynamic is its ability to heighten the interactive 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. Before dHTML, form attributes would specify \"actions\" for a common gateway interface (CGI) program to process. One of the powerful abilities of dHTML is to pass JavaScript through a browser as a 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.