toc.add(node_name(element), "part%d.html" % chunk_no)
elif element.tag in ('naglowek_podrozdzial', 'naglowek_scena'):
subnumber = toc.add(node_name(element), "part%d.html" % chunk_no, level=1, is_part=False)
toc.add(node_name(element), "part%d.html" % chunk_no)
elif element.tag in ('naglowek_podrozdzial', 'naglowek_scena'):
subnumber = toc.add(node_name(element), "part%d.html" % chunk_no, level=1, is_part=False)