[O] Can org-info.js fold top level only?

[Tom]

I tried javscript folding of exported web pages following
the instructions here:

http://orgmode.org/manual/JavaScript-support.html

It works nicely, the top level headlines are initially collapsed and 
they can be opened with a click, however a click exposes all
the lower level headlines under the top level headline and ther contents
recursively.

Can org-info.js open only one level of headlines (the ones immediately
under the header clicked) without opening all the headlines and contens
under them?

It would be nice to be able to go down a tree only a level a time
without exposing all the lower leves immediately.