Nadya,

>Are you sure, you invented it? If yes, it should be attributed to you, but unfortunately, I can not change our classes without some hassles...

Yes, it was me. Unfortunately the UT search does not seem to work (at least for me) so I can't search the thread. Anyways, don't bother to addres it to me: it's fine. It was nice to see that this was idea is actually used by someone else.

Walter,