diff --git a/24_day/bootpack.c b/24_day/bootpack.c
index f24570d..0bff4b5 100644
--- a/24_day/bootpack.c
+++ b/24_day/bootpack.c
@@ -282,6 +282,11 @@ void HariMain(void)
 								if (0 <= x && x < sht->bxsize && 0 <= y && y < sht->bysize) {
 									if (sht->buf[y * sht->bxsize + x] != sht->col_inv) {
 										sheet_updown(sht, shtctl->top - 1);
+										if (sht != key_win) {
+											cursor_c = keywin_off(key_win, sht_win, cursor_c, cursor_x);
+											key_win = sht;
+											cursor_c = keywin_on(key_win, sht_win, cursor_c);/*到此结束*/
+										}
 										if (3 <= x && x < sht->bxsize - 3 && 3 <= y && y < 21) {
 											mmx = mx; /*进入窗口移动模式*/
 											mmy = my;