array Pager::getOffsetByPageId ([integer $pageid = NULL])
array Pager::getOffsetByPageId
Returns offsets for given pageID. Eg, if you pass it pageID one and your perPage limit is 10 it will return (1, 10). pageID=2 would give you (11, 20).
if the method is called without parameter, pageID is set to currentPage
integer $pageid - PageID to get offsets for
return array with first and last offsets
deprecated
