static char *sccsid
= "@(#)cmd5.c 3.1 83/08/11";
register brow = selwin->ww_scroll;
brow += dir * selwin->ww_w.nrow / 2;
else if (brow + selwin->ww_w.nrow > selwin->ww_nline)
brow = selwin->ww_nline - selwin->ww_w.nrow;
if (brow != selwin->ww_scroll) {
selwin->ww_scroll = brow;