Thank you Xavier. Actually, the guy who builds the site is 
using JS templates while building (so he can change all 
pages by modifying one script), and when he's done, he 
converts it all to HTML. He just posted a HTML sample for 
me so I can find a solution to his CSS problem, and I did. 
So everything is OK now.

P.S.: The three of us are French and we communicate in 
English! lol