algorithm of pages beaking

Hi, I am working in page breaking (dividing the result of a select query in multiple pages). Now my problem is not with the php code, but with the algorithm that organize the links to the pages. I want to do something like google, the pages numbers at the bottom of the page must not exceed a maximum number, the actual page must be in the center of the links to other pages and there are a lot of other conditions that arise. Do you know about a site that describe these conditions or may be propose the whole algorithm for that? Thank you ____________________________________________________________________________________ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping