PO Box Regular Expression Validation

Question

Here\'s my code, but I can\'t ever trigger the alert.

$(document).ready( function (){
    $(\"[id*=\'txtAddress1S\']\").blur(function() {
        var pattern         


        

Answer 1

In javascript, you have to escape your slashes:

var pattern = new RegExp('\\b[P|p]*(OST|ost)*\\.*\\s*[O|o|0]*(ffice|FFICE)*\\.*\\s*[B|b][O|o|0][X|x]\\b');

Also, you could reduce your pattern a bit by using case-insensitive matching:

var pattern = new RegExp('\\b[p]*(ost)*\\.*\\s*[o|0]*(ffice)*\\.*\\s*b[o|0]x\\b', 'i');

Note: Your regex also matches on addresses such as:

• 123 Poor Box Road
• 123 Harpo Box Street

I would suggest also checking for a number in the string. Perhaps this pattern from a previous answer would be of some help:

var pattern = new RegExp('[PO.]*\\s?B(ox)?.*\\d+', 'i');

(it won't match on "Post Office" spelled out, or the numeric replacements.. but it's a start.)