SlideBar is a two-level horizontal menu. Bars containing second-level links slide out horizontally when the mouse moves over a first-level label. The menu can be aligned to the left or right of the page and items slide out in the appropriate direction. Items react to mouse-hover by fading between colors, and can have gradient fills. Different fonts, styles and colors can be applied to first- and second-level items. SlideBar supports MP3 sound effects, and transparency in compatible browsers.