Limiting results of capture input

I have the following code:

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I want to be able to limit the numbers that can be returned. for example for vresponse 4 I need the number to be between 0 and 30. And if it's not to come up with an error message before you go to the next one. Is this possible? or something along those lines

Also, a harder one. For vresponse 1 i need to have the outcome in the format of "xxx|yyy". So, the x's and y's represent numbers. So it should return an error if there is like no "|". the thing is the thing that's entered could be anything such as: 1|1, 1|999, 999|1, 999|999 and so on. So it can't be like there has to be a "|" 3 digits in. I would be happy if you had something that gives an error if what you entered didn't contain a "|".

Just to clarify, it wouldn't check for this error until after you click ok

Thank you for any help you can give

Any ideas on how I could at least do part of this?