//万科在指定区间内的上涨下跌情况；
  setsysparam(pn_stock(),'SZ000002');
  end_date := inttodate(20110909);
  beg_date := IncWeek(end_date,-1); //end_date 前推一个
  r := array();
  i := 0;
  for d := end_date downto beg_date do
  begin
   if not istradeday(d) then continue;
   setsysparam(pn_date(),d);
r[i]['date'] := datetostr(d);
   if IsUp() then r[i]['ud_state'] := '涨';
   else if IsDown() then r[i]['ud_state'] := '跌';
   else if IsEqual() then r[i]['ud_state'] := '平';
   i++;
  end;
  return r;