Dardaigh: What do these HTML status codes mean?

HTTP Code 301 means redirect and is most often used to forward a user from an old page to a new one.

404 code means Not Found, the page/file does not exist.

503 http code means Service unavailable. Something is wrong with the HTTP service on the server (or some error in code).

wow..thanks robertman..

Check http://www.w3schools.com/tags/ref_httpmessages.asp for a full list of status codes.