|Actually it's a placeholder for Combat. The two content tabs switch back and forth, and in a way that allows for many more tabs for switching! The code is written: for each tab, if it's the selected one, change it to display:inline. Otherwise, change it to display:none. Actually, it worked like this when there was only one tab, and now it just works with more.
And yes, this means I've finally started to convert the Combat script to work in the new system. It'll be slow and arduous but worthwhile.