URL for previous pages, the correct way

where N is the page number.

For instance to access page 4 of the Anyboard support forum the URL is
http://anyboard.net/cgi-bin/anyboard.cgi/netbula/support/?cmd=view_page&pgno=4

To view all posts use
?cmd=view_page&pgno=A

Note, Anyboard will redirect you to a page like 4index.html for page 4, DO NOT use this as the URL for the 4th page. This is because Anyboard does not generate this page until someone access it. When some body is trying to access page 4, Anyboard will
1) check if the file 4index.html is too old and needs regeneration
2) if it is old, anyboard regens it.
3) redirect the browser to 4index.html