Melkior,
Thanks again for your great help...

I still have the same blockage in my brain : How do I know what to query when I cannot anticipate what the user clicks on? He/she could click on the furniture by room selection, choosing "Living room" for example and then a specific sofa, but he/she could also go to the furniture by range selection, choose a range and then a different item...This where I really get stuck...

Great that you learned all the stuff without any books or so. When I start sth my confidence is usually very low, so I invest in a book with the outcome that I read the whole thing and then forget about it

The ever so tired lala (too much paper work today )