Menu problem, help please!

Hi everyone,

I have a problem with my menu on this page
http://www.val-joanis.com/maquette/
I'm not at all good in programming, I adapted a script for it, it seemed to
work at first but now, I guess you'll see the problem, I can't access the
submenus, it just all sets back to accueil (which is normal) At the
beginning I could access them without any problem...I can't figure out what
I changed!

I would appreciate any help!! Thanks in advance,

Sarah