Thank you in advance for your help. Javascript is just a bit much over my head to figure this out from searching this forum and the web for answers.

A client is going to allow people to call in and pay by phone. I set up a check box for them to click if they phone in. If they click that check box, another box will come up beside it asking them for a code. There will be one of two 4-digit codes they will give someone on the phone.

How do I put that for the phone code box there are only two 4-digit numbers that will be accepted if typed in it?

Thanks again. I know this should be easy, but I'm just not knowledgeable enough for it. I'm attaching my .fb file.

Never mind! Just figured out regular expression to use (had one-set mind on js use) during another web search

/^[number you want to use][other number you want to use]+$/

I thought I did but the 2 four digit numbers I entered, it'll take any combination of those 4 numbers. I'll keep looking until someone gets it and posts here or I find out what's missing to make it work to do what I need to

Yeah got it If anyone needs in future:

!(3200|0023)!
Will only allow one of those 2 numbers

Sorry if this is somewhere already, like I said, was on a one-track mind with javascript, didn't think about regular expression.