Problem summary

User needs to navigate among a website's main sections while still being able to quickly browse to the subsection of another.

Solution

• Each headline / section has a panel, which upon clicking can be expanded either vertically or horizontally into showing its subsections. Vertical Accordion menus are the most frequently used.
• The transition from showing no options of a headline to showing a headline’s list of options can be done either with a page refresh or with a javascript DHTML animation.
• When one panel is clicked it is expanded, while other panels are collapsed.

Rationale

Accordion menus are often used as a website’s main navigation. In this way, it acts much like Navigation Tabs, as menu items are collapsed when a new panel is clicked. Where the Navigation Tabs are most often used horizontally, Accordion menus are most often used vertically.

Accordion menus can however also function quite well as sub-navigation for a specific section of a website.