Product attribute text input validation

hi.

i want to validate the text input fields. i need them to be in a certain range for certain products. if possible i don't want to hard code my values in Nop.Web.Views._ProductAttributes.cshtml and validate them via ajax. is there a more elegant solution to this? could i use an actionfilter for that or is it even simpler than that?

you can use javascript. or if you want to validate from server side you can also use json.

thank you for your answer. sadly i don't know how to apply it to my problem. WHERE should i validate the field via js/json? in a plugin? directly in the nopcommerce code?