2) how can i garantee, with regex, that user is writting, for example, 2004/2005 and not 2004/2003?
You can't. (Well, you could by simply iterating all possible combinations, but I guess that doesn't qualify as a reasonable solution...) [ October 08, 2004: Message edited by: Ilja Preuss ]
The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus