PageDownAdvances the current row of the Control by the page size. Stops at the last row, if the current row would move past the last row. The page size is equal to zero and therefore has no effect if there are fewer than 30 rows in the rowset. The page size is the number of rows divided by 10 and rounded down.
Use getPageSize to get the value of the page size.
sajsset.PageDown();
sajsset.PageDown