[Bug-wget] wget and collapsible lists?

[Johnny]

I am trying to fetch a complete set of pdf docs, whereof some are
"hidden" in a collapsible list; if you visit the site you must expand
the list to get the docs. Usind wget, I cannot get all the files (the
top level files downloads, but not the rest).

This is what I tried:
wget -r -H -l 3 -A pdf
https://www.ukap1000application.com/doc_pdf_library.aspx


Please help!

Johnny