I'm not 100% sure this is right, so, MAKE A BACKUP please, before you try the query below.
UPDATE Tbl_TemporaryDetails SET Tbl_TemporaryDetails.[News Item] = Forms!Frm_News![TxtNewsItem], Tbl_TemporaryDetails.[Web Link] = Forms!Frm_News![TxtWeblink]
WHERE (((Tbl_TemporaryDetails.[1TblID])=[Forms]![Frm_News]![2TblID]));