Not sure how you missed it Aapje but Ady explained it in laymans terms three or so posts above yours.
See here
DARG!
not my day
well now i kinda feel stupid......so srry about that
DOH!
><'
srry sryy sryy sryy*starts banging my head on the table till it cracks and keeps saying srry while doing this*
TOTALLY NOT my day