BGP ASN - AS-PLAIN to AS-DOT (and AS-COLON) calculator and back

If you know what AS-DOT and what AS-PLAIN is, you know why you might want this calculator :) Oh and if you are a RedBack user, you'll be suffering from the abomination that is AS-COLON. It's just the same as AS-DOT, but with a colon (:) instead of the dot (.), alas the name ;)
AS-PLAIN number: AS-DOT number: .