PHP Oracle 8 Functions Efficiency Problem

I have an HTML form which allows users to query data in an Oracle 8 Database. Usualy a search may return over 100 records so I diplay 10 records per page. I would like to make the search more efficient by using the OCISetPrefetch to prefetch the first 10 records. This works great for the first page but for a page that displays records 90 to 100, I have to prefetch 100 records. I have two questions 1) Is there any way of fetching or Prefetching only say rows 80 to 90 of a result set? 2) Has anyone tried to save a cursor or connection into a session? Thanks in advance