Question

I’m getting “Unable to get value of the property ‘match’: object is null or undefined” when the function below works. The interesting part is that it is working perfectly on another page. Any ideas?

function valPoBox(sender, args) {
    var hasPObox = /^[P|p]*(OST|ost)*\.*\s*[O|o|0]*(ffice|FFICE)*\.*\s*[B|b][O|o|0][X|x]\s*(\d.)*/gi;
    var StreetAddress = $('.streetaddress').val();

    if (StreetAddress.match(hasPObox)) {
        args.IsValid = false;

        sender.ErrorMessage = "Address must not contain P.O. Box";
        $('.valPoBox').attr("ErrorMessage", sender.ErrorMessage);
    }
    else {
        args.IsValid = true;
    }

}

Answer 1

All strings have a match method, therefore what you are dealing with must not be a string. the .val() method only returns two different things: a string when an element is found, and undefined when an element is not found. With this in mind, $('.streetaddress') must be returning 0 elements. Modify the selector so that it targets the correct elements to fix the issue.