Regular Express for P.O. Box Addresses

post_office_regex.js

/* Credit: https://github.com/EpicVoyage/pobox-regex */

var pos = $(this).val().search(/(?:P(?:ost(?:al)?)?[\W\s]*(?:(?:O(?:ffice)?[\W\s]*)?B(?:ox|in|\b|\d)|o(?:ffice|\b)(?:[\W\s]*\d)|code)|b(?:o*x|i*n)[\W\s\b]*\d)|(?:P+[\W\s]*O+[\W\s]*)/i);
if (pos >= 0) { // P.O. box address was entered, so disable Submit button and display warning message
    $("#submit_primary").attr("disabled", true);
    if ($("#element_2_warning").length == 0) {
        var text = "<div class='alert alert-warning' style='font-size: 12pt' id='element_2_warning'><strong style='color: #FF0000'>";
        text = text + "Street Address only, no P.O. Box.</strong></div>";
        $(text).insertBefore($("#li_2"));
    }
    $("#element_2_warning").show();
} else { // not a P.O. box address, so enable Submit button and hide warning message
    $("#submit_primary").removeAttr("disabled");
    $("#element_2_warning").hide();
}

/*

The regex matches the following:

123 P O Box
123 P... O 456
123 PO 456
biin 123
bin 123
bn 123
boox 123
box 123
bx 123
Box-123
Box-- 123
Box123
P O box 123
p-o box 123
p-o-box 123
P. O. Box 123
P.o box 123
P.O. Box 123
p.o. Box123
p.o.-box 123
P.O.B 123
P.O.B. 123
P.O.Box 123
PO Biin 123
PO Bin 123
PO Bn 123
PO Boox 123
PO Box 123
PO Bx 123
PO-Box 123
po-box123
PO. Box 123
pob 123
pob123
Pobox 123
pobox123
Post Box #123
post box 123
post office 123
Post Office Bin 123
post office box 123
Postal Box 123
Postal Code 123

*/