WARNING: Throw away your javascript validation. I repeat: WARNING: Throw away your javascript validation.

Never trust javascript validation unless you are using it with an SSI on the backend. Feel free to run the form variables through javascript initially, but when it comes to processing the actual form you need to rely on a server side language such as PHP, ASP, etc.

Client-side javascript can be turned off and is easily manipulated in other ways.

__________________
I use Country IP Blocks as added security for my networks and servers.