Sorry for the possibly noob question. But I sure wish the 'Search' here worked a bit better. I'm sure it's been asked a bunch of times!

I have added several text 'attributes' that I need to be validated. The validation is not only -required- but the fields are 17 chars and MUST be completely filled and MUST conform to a pattern of alpha and numeric (one is a VIN for example).

How does one enforce rules for such validation?

TIA,

---JC

PS: I'm cool with JS or PHP. I just wanna know where to start looking... or where in the Admin I can go to do it and save myself some work!