By default Joomla! uses special templates when it needs to raise an error response. These are located in the templates/system directory. For server-level status codes these are named for the status code that is being raised. These are the default system error pages available:-
The status codes are defined as part of the HTTP protocol in RFC2616. For further information on HTTP status codes see: http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
These pages can be styled using the following CSS classes:
In addition, these system error pages are also available:
Note that jdoc:include elements are not parsed in these error pages.