That's a really interesting answer ! thanks !
i've also asked myself a lot of time how i could do that, and never thought it could be so buggy. From your link, my answer to this :

On the other hand, I could try to answer on a different level, present a better solution, and maybe slap a little education on `em. That's nice when it works, but if it doesn't it's really sad to see your hard work and good advice ignored.
I really do prefer when people just tell me i'm on a wrong way, the time you think you lose in learning a new concept isn't losed most of the time.

A huge thank to all people who take time for this !

Marsel