The twitter-bootstrap 'hero' example (http://twitter.github.io/bootstrap/examples/hero.html) works well. At the risk of describing the obvious... On small screens, when the navbar menu is activated, only the first-level items are visible, sub-items are collapsed. When an item with child items is tapped, the child items expand and become visible. They can also be collapsed by tapping the parent again.
I am using a bootstrap template on a Joomla site (http://wright.gvta.net/). Unfortunately, when the navbar is activated on a small screen, it expands the many subitems. Tapping a parent item does not expand/collapse its child items.
How do I get twitter-bootstrap navbar subitems to collapse/expand on small screens? What bootstrap code/files are responsible for this behaviour?
I know some css and javascript, but not enough to figure this out.
Thank you.