CodeSOD: Classic WTF: RegExp from Down Under
by Alex Papadimoulis from The Daily WTF on (#1KEDV)
This particularly bad example of regular expressions and client side validation was originally published in 2009. I thought Australia was supposed to be upside down, not bass ackwards. - Remy
[Advertisement] Release!is a light card game about software and the people who make it. Play with 2-5 people, or up to 10 with two copies - only $9.95 shipped! 
"The company I work for sells vacation packages for Australia," writes Nathan, "and for whatever reason, they're marketed under different two different brands - redacted-travel.com.au and redacted-travel.com - depending on whether you live Down Under or somewhere else in the world."
Nathan continues, "one of the requirements for the international website (redacted-travel.com) is to disallow people from within Australia and New Zealand to make bookings. But the way this is done from the front end... well, it's a real gem."
/** *Checks to see if Australia is typed into the other country box */ function checkContactCountry(inputBox) { var validator = new RegExp( /^(A|a)(U|u)(S|s)(T|t)(R|r)(A|a)(L|l)(I|i)(A|a) |(N|n)(E|e)(W|w)(Z|z)(E|e)(A|a)(L|l)(A|a)(N|n)(D|d) |(N|n)(E|e)(W|w) (Z|z)(E|e)(A|a)(L|l)(A|a)(N|n)(D|d)$/); if(validator.test(inputBox.value)) { alert("Your Residential Address must be outside Australia. " + "Enter your residential address outside this country," + "or visit redacted-travel.com.au to make a booking if " + " you live in Australia."); inputBox.focus(); inputBox.select(); } }