The menu presented in
http://www.impulseinformatica.com.br/lab/testamenu.php works fine in
IE 5+, but for Netscape itīs giving me 2 errors:
1) when a submenu pops up, it allocates space in the page (in spite of
itīs inside a relative div and being defined as absolute. In others
words, it pushes the content.
2) it doesnīt allocate enough space (u can draw a div around the
content thatīs bellow with a border to check), and the last menu itens
arenīt reachable because apparently the implicit div which has the
content has a greater z-index than the menu.

I will consider this question answered with a working code for IE and
NS7 and a full explanation of it.

Thank you,
Nilo