Ignore me, just sticking this here so I don't have to go hunting for it when I work on TTIDB templates:
https://invisioncommunity.com/4guides/themes-and-customizations/javascript-framework/using-ui-widgets/ipsuitabbar-r66/
https://invisioncommunity.com/4guides/themes-and-customizations/javascript-framework/using-ui-widgets/ipsuitabbar-r66/
