This prevents the user from having to send a mouse click to choose the selection. For some screen readers an external keypad takes the place of the mouse and is used for navigating around a graphical environment and issuing commands. Physically, it resembles a detached number pad. Some Web browsers support the use of electronic fill-in forms that are part of some web pages. Forms usually consist of dialogue boxes , pulldown menus, radio buttons and check mark buttons.
Web pages use forms to collect relevant information from different people.
Some web browsers support special HTML tags that allow you to divide the browser window into several sub-windows. Each sub-window contains a different document. Selections made in one frame may or may not affect the outcome of other frames. The user must select the current frame before hypertext links within that frame can be manipulated. A computer system or program environment that requires the manipulation of visual icons and graphics to move about file structures and to issue program functions.