I see coloured squares now
but hovering my mouse or doing anything with the cursor has no reaction from my browser.

Perhaps I am being thick. I am using Safari which is the Apple version of Firefox and is normally more stable than ie or firefox.
( Enigmatic ™                 Voice No More                  ©, Sun 3 Jul 2005, 18:07, archived)

ah
for the mouseover i'm using title attributes, which works here on FF and IE - but i can't vouch for safari, or much else for that matter.
( sex and dougs and rock n roll, Sun 3 Jul 2005, 18:13, archived)