Actually, it depends on the server-side language you're going to use.
But, it's as simple as reading out the values in the POST and GET Values the Form delivers you.
i.e. PHP:
if($_POST["js_enabled"] == 0)
{
doSomething(); // Redirecting
}
But don't forget to validate all values.
good luck,
rAyt
Edit
There you go (pretty good answer though)
Henrik P. Hessel
2009-07-13 23:23:33