If you use this plugin you have to do a few more things:
- get the number of total pages for that particular product (using COUNT(*) WHERE product_id=...) and store it into items varialble
- prepare a php script that will return the records for one page, using itemsOnPage parameter (or modify existing script)
- use onPageClick function which will call above mentioned php script to fetch pages
But documentation for this plugin is not very comprehensive. So maybe you try this one, which has a nice tutorial along with it.
I have never done any jquery/ajax pagination so I can not give you any finished code. I used PEAR Pager class for this purpose and it was doing it's job very well.