Background
The colours or images used as the background of a Web page.

Balloon Help
Information that appears in a small area when the mouse pointer is positioned on a page element (for instance, topic title, menu, image, etc.).

Banner
A small area of a window or screen used for advertising purposes, often consisting of GIF images. A standard size for this area is 486 x 60 pixels.

Behaviour
In Dreamweaver, interaction between objects of a Web page, for instance, the change in the display of a page element when the mouse pointer is placed over a link.

Bitmap Image
A pixel-based image (.BMP). Its quality decreases when the image is enlarged.

Border
The boundary of a HTML element. The thickness of a border is expressed in pixels.

Browser
A program used to navigate Internet sites.