Canadian postal code validation

postalregex.js

/* 
Slightly strict regex check for validly formatted Canadian postal code
http://jsfiddle.net/7mBFf/
*/

var postal = new RegExp(/^\s*[a-ceghj-npr-tvxy]\d[a-ceghj-npr-tv-z](\s)?\d[a-ceghj-npr-tv-z]\d\s*$/i);

console.log(postal.test('m6k1s4')); // returns true
console.log(postal.test('M6K1S4')); // returns true
console.log(postal.test('90210')); // returns false
console.log(postal.test('d6k1s4')); // returns false