TabPanel is a 2-level tabbed menu consisting of an unlimited number of tabs arranged horizontally in a single row above the main panel. Scroll buttons are shown automatically if required, allowing hidden tabs to be scrolled into view. Selecting a new tab displays an unlimited number of text-buttons on the main panel. Each button links to a separate URL, and tabs can optionally also act as links. Parameters allow full customization of all colors, fonts and styles, and sounds are supported