diff --git a/src/web/client/ads.html b/src/web/client/ads.html
index 87c300d..1bc8a75 100644
--- a/src/web/client/ads.html
+++ b/src/web/client/ads.html
@@ -36,18 +36,18 @@
 
 		<!-- global source files -->
 		<script src="../../game/lib/session_storage_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<script src="../../game/lib/util/number_util.js"></script>
 		<script src="../../game/lib/util/string_util.js"></script>
 		<script src="../../game/lib/util/date_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/announce_box.js?update_date=191224"></script>
-		<script src="../../game/lib/text/how_to_play.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/announce_box.js"></script>
+		<script src="../../game/lib/text/how_to_play.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
 		<script src="../../game/lib/history_record_manager.js"></script>
diff --git a/src/web/client/card_matching.html b/src/web/client/card_matching.html
index 0c8974f..ebe9747 100644
--- a/src/web/client/card_matching.html
+++ b/src/web/client/card_matching.html
@@ -38,19 +38,19 @@
 		<script src="../../game/lib/session_storage_manager.js"></script>
 		<script src="../../game/lib/score_manager.js"></script>
 		<script src="../../game/lib/heart_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<script src="../../game/lib/util/number_util.js"></script>
 		<script src="../../game/lib/util/record_util.js"></script>
 
 		<script src="../../game/lib/text/combo_text.js"></script>
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/time_over_text.js?update_date=191225"></script>
-		<script src="../../game/lib/text/score_board.js?update_date=191224"></script>
-		<script src="../../game/lib/text/score_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/time_over_text.js"></script>
+		<script src="../../game/lib/text/score_board.js"></script>
+		<script src="../../game/lib/text/score_text.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
 		<script src="../../game/lib/history_record_manager.js"></script>
@@ -68,7 +68,7 @@
 		<script src="../../game/mouse/card_matching/dude_card.js"></script>
 		<script src="../../game/mouse/card_matching/plus_score.js"></script>
 
-		<script src="../../game/mouse/card_matching/game.js?update_date=191225"></script>
+		<script src="../../game/mouse/card_matching/game.js"></script>
 		<script src="../../game/mouse/card_matching/main.js"></script>
 
 
diff --git a/src/web/client/dodge.html b/src/web/client/dodge.html
index c7ec541..02a59b9 100644
--- a/src/web/client/dodge.html
+++ b/src/web/client/dodge.html
@@ -38,19 +38,19 @@
 		<script src="../../game/lib/session_storage_manager.js"></script>
 		<script src="../../game/lib/score_manager.js"></script>
 		<script src="../../game/lib/heart_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<script src="../../game/lib/util/number_util.js"></script>
 		<script src="../../game/lib/util/record_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/time_over_text.js?update_date=191225"></script>
-		<script src="../../game/lib/text/game_over_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/score_board.js?update_date=191224"></script>
-		<script src="../../game/lib/text/score_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/time_over_text.js"></script>
+		<script src="../../game/lib/text/game_over_text.js"></script>
+		<script src="../../game/lib/text/score_board.js"></script>
+		<script src="../../game/lib/text/score_text.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
 		<script src="../../game/lib/history_record_manager.js"></script>
@@ -65,7 +65,7 @@
 		<script src="../../game/mouse/dodge/spaceship.js"></script>
 		<script src="../../game/mouse/dodge/missile.js"></script>
 		<script src="../../game/mouse/dodge/stop_watch.js"></script>
-		<script src="../../game/mouse/dodge/game.js?update_date=191225"></script>
+		<script src="../../game/mouse/dodge/game.js"></script>
 		<script src="../../game/mouse/dodge/main.js"></script>
 
 
diff --git a/src/web/client/grilled_meat.html b/src/web/client/grilled_meat.html
index e21388d..e0cb340 100644
--- a/src/web/client/grilled_meat.html
+++ b/src/web/client/grilled_meat.html
@@ -38,18 +38,18 @@
 		<script src="../../game/lib/session_storage_manager.js"></script>
 		<script src="../../game/lib/score_manager.js"></script>
 		<script src="../../game/lib/heart_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<script src="../../game/lib/util/number_util.js"></script>
 		<script src="../../game/lib/util/record_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/time_over_text.js?update_date=191225"></script>
-		<script src="../../game/lib/text/score_board.js?update_date=191224"></script>
-		<script src="../../game/lib/text/score_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/time_over_text.js"></script>
+		<script src="../../game/lib/text/score_board.js"></script>
+		<script src="../../game/lib/text/score_text.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
 		<script src="../../game/lib/history_record_manager.js"></script>
@@ -70,7 +70,7 @@
 		<script src="../../game/mouse/grilled_meat/plus_score.js"></script>
 		<script src="../../game/mouse/grilled_meat/speech_bubble.js"></script>
 
-		<script src="../../game/mouse/grilled_meat/game.js?update_date=191225"></script>
+		<script src="../../game/mouse/grilled_meat/game.js"></script>
 		<script src="../../game/mouse/grilled_meat/main.js"></script>
 
 
diff --git a/src/web/client/license_timer.html b/src/web/client/license_timer.html
index 8477c2e..f17f1cd 100644
--- a/src/web/client/license_timer.html
+++ b/src/web/client/license_timer.html
@@ -37,7 +37,7 @@
 
 		<!-- global source files -->
 		<script src="../../game/lib/session_storage_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<script src="../../game/lib/util/number_util.js"></script>
@@ -45,9 +45,9 @@
 		<script src="../../game/lib/util/record_util.js"></script>
 		<script src="../../game/lib/util/date_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/sprite/sprite_icon_timer.js"></script>
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
diff --git a/src/web/client/menu_app.html b/src/web/client/menu_app.html
index df4d0c3..47e748d 100644
--- a/src/web/client/menu_app.html
+++ b/src/web/client/menu_app.html
@@ -35,14 +35,14 @@
 
 		<!-- global source files -->
 		<script src="../../game/lib/session_storage_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<script src="../../game/lib/util/number_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
 		<script src="../../game/lib/button/round_rect_button.js"></script>
diff --git a/src/web/client/menu_app_play_free.html b/src/web/client/menu_app_play_free.html
index ae5b938..6f3d296 100644
--- a/src/web/client/menu_app_play_free.html
+++ b/src/web/client/menu_app_play_free.html
@@ -36,14 +36,14 @@
 
 		<!-- global source files -->
 		<script src="../../game/lib/session_storage_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<script src="../../game/lib/util/number_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
 		<script src="../../game/lib/button/round_rect_button.js"></script>
diff --git a/src/web/client/menu_typing_practice.html b/src/web/client/menu_typing_practice.html
index ca2c037..071f06b 100644
--- a/src/web/client/menu_typing_practice.html
+++ b/src/web/client/menu_typing_practice.html
@@ -35,16 +35,16 @@
 
 		<!-- global source files -->
 		<script src="../../game/lib/session_storage_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<script src="../../game/lib/util/number_util.js"></script>
 		<script src="../../game/lib/util/string_util.js"></script>
 		<script src="../../game/lib/util/record_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
 		<script src="../../game/lib/button/round_rect_button.js"></script>
@@ -53,7 +53,7 @@
 		<script src="../../game/lib/button/typing_app_button.js"></script>
 		<script src="../../game/lib/button/typing_tab_button.js"></script>
 		<script src="../../game/lib/db_connect_manager.js"></script>
-		<script src="../../game/typing/lib/animal.js?update_date=191224"></script>
+		<script src="../../game/typing/lib/animal.js"></script>
 
 		<!-- Menu typing practice : source files -->
 		<script src="../../game/menu/app_area_bg.js"></script>
diff --git a/src/web/client/menu_typing_test.html b/src/web/client/menu_typing_test.html
index a4a6916..b600072 100644
--- a/src/web/client/menu_typing_test.html
+++ b/src/web/client/menu_typing_test.html
@@ -35,16 +35,16 @@
 
 		<!-- global source files -->
 		<script src="../../game/lib/session_storage_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<script src="../../game/lib/util/number_util.js"></script>
 		<script src="../../game/lib/util/string_util.js"></script>
 		<script src="../../game/lib/util/record_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
 		<script src="../../game/lib/button/round_rect_button.js"></script>
@@ -53,7 +53,7 @@
 		<script src="../../game/lib/button/typing_app_button.js"></script>
 		<script src="../../game/lib/button/typing_tab_button.js"></script>
 		<script src="../../game/lib/db_connect_manager.js"></script>
-		<script src="../../game/typing/lib/animal.js?update_date=191224"></script>
+		<script src="../../game/typing/lib/animal.js"></script>
 
 		<!-- Menu typing test : source files -->
 		<script src="../../game/menu/app_area_bg.js"></script>
diff --git a/src/web/client/onetofifty.html b/src/web/client/onetofifty.html
index d70a3d9..89b32b7 100644
--- a/src/web/client/onetofifty.html
+++ b/src/web/client/onetofifty.html
@@ -42,7 +42,7 @@
 
 		<!-- library source files -->
 		<script src="../../game/lib/util/number_util.js"></script>
-		<script src="../../game/lib/util/record_util.js?update_date=190511"></script>
+		<script src="../../game/lib/util/record_util.js"></script>
 
 		<script src="../../game/lib/text/input_type_text.js"></script>
 		<script src="../../game/lib/text/mission_clear_text.js"></script>
diff --git a/src/web/client/ranking.html b/src/web/client/ranking.html
index 3b1862b..916d73a 100644
--- a/src/web/client/ranking.html
+++ b/src/web/client/ranking.html
@@ -37,19 +37,19 @@
 		<script src="../../game/lib/session_storage_manager.js"></script>
 		<script src="../../game/lib/score_manager.js"></script>
 		<script src="../../game/lib/heart_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=190608"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
-		<script src="../../game/lib/util/date_util.js?update_date=190608"></script>
+		<script src="../../game/lib/util/date_util.js"></script>
 		<script src="../../game/lib/util/number_util.js"></script>
-		<script src="../../game/lib/util/string_util.js?update_date=190608"></script>
+		<script src="../../game/lib/util/string_util.js"></script>
 		<script src="../../game/lib/util/record_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/game_over_text.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/game_over_text.js"></script>
 		<script src="../../game/lib/text/ranking_text.js"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
 		<script src="../../game/lib/ranking_record_manager.js"></script>
@@ -63,7 +63,7 @@
 
 
 		<!-- Ranking : source files -->
-		<script src="../../game/ranking/ranking.js?update_date=190608"></script>
+		<script src="../../game/ranking/ranking.js"></script>
 		<script src="../../game/ranking/main.js"></script>
 
 
diff --git a/src/web/client/result.html b/src/web/client/result.html
index a74944e..edcf6c4 100644
--- a/src/web/client/result.html
+++ b/src/web/client/result.html
@@ -16,22 +16,22 @@
 
 		<!-- global source files -->
 		<script src="../../game/lib/session_storage_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=190719"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<script src="../../game/lib/color/main_color.js"></script>
 
 		<script src="../../game/lib/util/number_util.js"></script>
-		<script src="../../game/lib/util/string_util.js?update_date=190608"></script>
+		<script src="../../game/lib/util/string_util.js"></script>
 		<script src="../../game/lib/util/record_util.js"></script>
-		<script src="../../game/lib/util/date_util.js?update_date=190608"></script>
+		<script src="../../game/lib/util/date_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/announce_box.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/announce_box.js"></script>
 		<script src="../../game/lib/text/history_text.js"></script>
 		<script src="../../game/lib/text/ranking_text.js"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
 		<script src="../../game/lib/history_record_manager.js"></script>
@@ -41,13 +41,13 @@
 		<script src="../../game/lib/button/round_rect_button.js"></script>
 		<script src="../../game/lib/button/back_button.js"></script>
 		<script src="../../game/lib/button/fullscreen_button.js"></script>
-		<script src="../../game/typing/lib/animal.js?update_date=191224"></script>
+		<script src="../../game/typing/lib/animal.js"></script>
 
 		<!-- Result : source files -->
-		<script src="../../game/result/history_board.js?update_date=190608"></script>
-		<script src="../../game/result/ranking_board.js?update_date=190608"></script>
-		<script src="../../game/result/record_board.js?update_date=190608"></script>
-		<script src="../../game/result/result.js?update_date=190608"></script>
+		<script src="../../game/result/history_board.js"></script>
+		<script src="../../game/result/ranking_board.js"></script>
+		<script src="../../game/result/record_board.js"></script>
+		<script src="../../game/result/result.js"></script>
 		<script src="../../game/result/main.js"></script>
 
 
diff --git a/src/web/client/setup.html b/src/web/client/setup.html
index ae8f8b0..7c6a33d 100644
--- a/src/web/client/setup.html
+++ b/src/web/client/setup.html
@@ -36,13 +36,13 @@
 
 		<!-- global source files -->
 		<script src="../../game/lib/session_storage_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<script src="../../game/lib/util/number_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
 		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
diff --git a/src/web/client/space_invaders.html b/src/web/client/space_invaders.html
index 1e8cf41..f92ef9f 100644
--- a/src/web/client/space_invaders.html
+++ b/src/web/client/space_invaders.html
@@ -38,19 +38,19 @@
 		<script src="../../game/lib/session_storage_manager.js"></script>
 		<script src="../../game/lib/score_manager.js"></script>
 		<script src="../../game/lib/heart_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<script src="../../game/lib/util/number_util.js"></script>
 		<script src="../../game/lib/util/record_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/time_over_text.js?update_date=191225"></script>
-		<script src="../../game/lib/text/game_over_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/score_board.js?update_date=191224"></script>
-		<script src="../../game/lib/text/score_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/time_over_text.js"></script>
+		<script src="../../game/lib/text/game_over_text.js"></script>
+		<script src="../../game/lib/text/score_board.js"></script>
+		<script src="../../game/lib/text/score_text.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
 		<script src="../../game/lib/history_record_manager.js"></script>
@@ -66,7 +66,7 @@
 		<script src="../../game/mouse/space_invaders/loading.js"></script>
 		<script src="../../game/mouse/space_invaders/alien.js"></script>
 		<script src="../../game/mouse/space_invaders/alien_timer.js"></script>
-		<script src="../../game/mouse/space_invaders/game.js?update_date=191225"></script>
+		<script src="../../game/mouse/space_invaders/game.js"></script>
 		<script src="../../game/mouse/space_invaders/main.js"></script>
 
 
diff --git a/src/web/client/start.html b/src/web/client/start.html
index 3d4f9f6..43b76df 100644
--- a/src/web/client/start.html
+++ b/src/web/client/start.html
@@ -16,19 +16,19 @@
 
 		<!-- global source files -->
 		<script src="../../game/lib/session_storage_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=190608"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<script src="../../game/lib/util/number_util.js"></script>
-		<script src="../../game/lib/util/string_util.js?update_date=190608"></script>
+		<script src="../../game/lib/util/string_util.js"></script>
 		<script src="../../game/lib/util/record_util.js"></script>
-		<script src="../../game/lib/util/date_util.js?update_date=190608"></script>
+		<script src="../../game/lib/util/date_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/announce_box.js?update_date=191224"></script>
-		<script src="../../game/lib/text/how_to_play.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/announce_box.js"></script>
+		<script src="../../game/lib/text/how_to_play.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
 		<script src="../../game/lib/history_record_manager.js"></script>
@@ -37,10 +37,10 @@
 		<script src="../../game/lib/button/round_rect_button.js"></script>
 		<script src="../../game/lib/button/back_button.js"></script>
 		<script src="../../game/lib/button/fullscreen_button.js"></script>
-		<script src="../../game/lib/chart.js?update_date=190608"></script>
+		<script src="../../game/lib/chart.js"></script>
 
 		<!-- Start : source files -->
-		<script src="../../game/start/start.js?update_date=190608"></script>
+		<script src="../../game/start/start.js"></script>
 		<script src="../../game/start/main.js"></script>
 
 
diff --git a/src/web/client/typing_exam.html b/src/web/client/typing_exam.html
index eb8f6d7..866201a 100644
--- a/src/web/client/typing_exam.html
+++ b/src/web/client/typing_exam.html
@@ -22,8 +22,8 @@
 		})(window,document,'script','dataLayer','GTM-N8PB4F3');</script>
 		<!-- End Google Tag Manager -->
 
-		<title>타자 검정 | 초코마에</title>
-		<meta name="description" CONTENT="타자 검정 - 한글/영문 타자 앱 | 초코마에 ‧ Typing examination - Korean/English typing app | ChocoMae">
+		<title>긴글 시험 | 초코마에</title>
+		<meta name="description" CONTENT="긴글 시험 - 한글/영문 타자 앱 | 초코마에 ‧ Typing examination - Korean/English typing app | ChocoMae">
 
 		<link rel="icon" href="/favicon.ico" type="image/x-icon" />
 		<link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" />
@@ -67,22 +67,12 @@
 		<!-- Examination typing : source files -->
 		<script src="../../game/typing/lib/content_progress.js"></script>
 		<script src="../../game/typing/lib/typing_text_manager.js"></script>
-		<!-- <script src="../../game/typing/lib/typing_content_bg.js"></script> -->
 		<script src="../../game/typing/lib/key_mapper.js"></script>
-		<!--
-		<script src="../../game/typing/lib/key_button.js"></script>
-		<script src="../../game/typing/lib/hand.js"></script>
-		<script src="../../game/typing/lib/keyboard.js"></script>
-		<script src="../../game/typing/lib/animal.js"></script>
-		<script src="../../game/typing/lib/animal_list.js"></script>
-		-->
 
 		<script src="../../game/lib/animal.js"></script>
 		<script src="../../game/lib/animal_record_list.js"></script>
 
-
 		<script src="../../game/typing/examination/define_variables.js"></script>
-		<!-- <script src="../../game/typing/examination/loading.js"></script> -->
 		<script src="../../game/typing/examination/average_typing_speed.js"></script>
 		<script src="../../game/typing/examination/game.js"></script>
 		<script src="../../game/typing/examination/main.js"></script>
diff --git a/src/web/client/typing_practice.html b/src/web/client/typing_practice.html
index d7e6749..3db6e50 100644
--- a/src/web/client/typing_practice.html
+++ b/src/web/client/typing_practice.html
@@ -22,8 +22,8 @@
 		})(window,document,'script','dataLayer','GTM-N8PB4F3');</script>
 		<!-- End Google Tag Manager -->
 
-		<title>타자 연습 | 초코마에</title>
-		<meta name="description" CONTENT="타자 연습 - 한글/영문 타자 앱 | 초코마에 ‧ Typing practice - Korean/English typing app | ChocoMae">
+		<title>손가락 연습 | 초코마에</title>
+		<meta name="description" CONTENT="손가락 연습 - 한글/영문 타자 앱 | 초코마에 ‧ Finger position practice - Korean/English typing app | ChocoMae">
 
 		<link rel="icon" href="/favicon.ico" type="image/x-icon" />
 		<link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" />
@@ -38,19 +38,19 @@
 		<script src="../../game/lib/session_storage_manager.js"></script>
 		<script src="../../game/lib/score_manager.js"></script>
 		<script src="../../game/lib/heart_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<!-- <script src="../../game/lib/keyboard_shortcut.js"></script> -->
-		<script src="../../game/lib/util/string_util.js?update_date=190517"></script>
+		<script src="../../game/lib/util/string_util.js"></script>
 		<script src="../../game/lib/util/number_util.js"></script>
 		<script src="../../game/lib/util/record_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/time_over_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/score_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/time_over_text.js"></script>
+		<script src="../../game/lib/text/score_text.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/history_record_manager.js"></script>
 		<script src="../../game/lib/button/round_rect_button.js"></script>
@@ -84,18 +84,18 @@
 
 		<!-- Practice typing : source files -->
 		<script src="../../game/typing/lib/typing_text_manager.js"></script>
-		<script src="../../game/typing/lib/typing_content_bg.js?update_date=190517"></script>
+		<script src="../../game/typing/lib/typing_content_bg.js"></script>
 		<script src="../../game/typing/lib/key_mapper.js"></script>
 		<script src="../../game/typing/lib/key_button.js"></script>
-		<script src="../../game/typing/lib/hand.js?update_date=190517"></script>
-		<script src="../../game/typing/lib/keyboard.js?update_date=190517"></script>
-		<script src="../../game/typing/lib/animal.js?update_date=191224"></script>
-		<script src="../../game/typing/lib/animal_list.js?update_date=190517"></script>
+		<script src="../../game/typing/lib/hand.js"></script>
+		<script src="../../game/typing/lib/keyboard.js"></script>
+		<script src="../../game/typing/lib/animal.js"></script>
+		<script src="../../game/typing/lib/animal_list.js"></script>
 
 		<script src="../../game/typing/practice/define_variables.js"></script>
 		<script src="../../game/typing/practice/typing_score.js"></script>
 		<script src="../../game/typing/practice/loading.js"></script>
-		<script src="../../game/typing/practice/game.js?update_date=190517"></script>
+		<script src="../../game/typing/practice/game.js"></script>
 		<script src="../../game/typing/practice/main.js"></script>
 
 
diff --git a/src/web/client/typing_test.html b/src/web/client/typing_test.html
index 5a0e5ff..3145277 100644
--- a/src/web/client/typing_test.html
+++ b/src/web/client/typing_test.html
@@ -22,8 +22,8 @@
 		})(window,document,'script','dataLayer','GTM-N8PB4F3');</script>
 		<!-- End Google Tag Manager -->
 
-		<title>타자 시험 | 초코마에</title>
-		<meta name="description" CONTENT="타자 시험 - 한글/영문 타자 앱 | 초코마에 ‧ Typing test - Korean/English typing app | ChocoMae">
+		<title>단어/문장 연습 | 초코마에</title>
+		<meta name="description" CONTENT="단어/문장 연습 - 한글/영문 타자 앱 | 초코마에 ‧ Word, sentence practice - Korean/English typing app | ChocoMae">
 
 		<link rel="icon" href="/favicon.ico" type="image/x-icon" />
 		<link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" />
@@ -38,18 +38,18 @@
 		<script src="../../game/lib/session_storage_manager.js"></script>
 		<script src="../../game/lib/score_manager.js"></script>
 		<script src="../../game/lib/heart_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
-		<script src="../../game/lib/util/string_util.js?update_date=190517"></script>
+		<script src="../../game/lib/util/string_util.js"></script>
 		<script src="../../game/lib/util/number_util.js"></script>
 		<script src="../../game/lib/util/record_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/time_over_text.js?update_date=191225"></script>
-		<script src="../../game/lib/text/mission_clear_text.js?update_date=191225"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/time_over_text.js"></script>
+		<script src="../../game/lib/text/mission_clear_text.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
 		<script src="../../game/lib/history_record_manager.js"></script>
@@ -83,18 +83,18 @@
 		<!-- Test typing : source files -->
 		<script src="../../game/typing/lib/content_progress.js"></script>
 		<script src="../../game/typing/lib/typing_text_manager.js"></script>
-		<script src="../../game/typing/lib/typing_content_bg.js?update_date=190517"></script>
+		<script src="../../game/typing/lib/typing_content_bg.js"></script>
 		<script src="../../game/typing/lib/key_mapper.js"></script>
 		<script src="../../game/typing/lib/key_button.js"></script>
-		<script src="../../game/typing/lib/hand.js?update_date=190517"></script>
-		<script src="../../game/typing/lib/keyboard.js?update_date=190517"></script>
-		<script src="../../game/typing/lib/animal.js?update_date=191224"></script>
-		<script src="../../game/typing/lib/animal_list.js?update_date=190517"></script>
+		<script src="../../game/typing/lib/hand.js"></script>
+		<script src="../../game/typing/lib/keyboard.js"></script>
+		<script src="../../game/typing/lib/animal.js"></script>
+		<script src="../../game/typing/lib/animal_list.js"></script>
 
 		<script src="../../game/typing/test/define_variables.js"></script>
-		<script src="../../game/typing/test/loading.js?update_date=190517"></script>
+		<script src="../../game/typing/test/loading.js"></script>
 		<script src="../../game/typing/test/average_typing_speed.js"></script>
-		<script src="../../game/typing/test/game.js?update_date=190517"></script>
+		<script src="../../game/typing/test/game.js"></script>
 		<script src="../../game/typing/test/main.js"></script>
 
 
diff --git a/src/web/client/whac_a_mole.html b/src/web/client/whac_a_mole.html
index b71b6f6..c545a16 100644
--- a/src/web/client/whac_a_mole.html
+++ b/src/web/client/whac_a_mole.html
@@ -38,7 +38,7 @@
 		<script src="../../game/lib/session_storage_manager.js"></script>
 		<script src="../../game/lib/score_manager.js"></script>
 		<script src="../../game/lib/heart_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<!-- <script src="../../game/lib/keyboard_shortcut.js"></script> -->
@@ -46,12 +46,12 @@
 		<script src="../../game/lib/util/number_util.js"></script>
 		<script src="../../game/lib/util/record_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/time_over_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/score_board.js?update_date=191224"></script>
-		<script src="../../game/lib/text/score_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/time_over_text.js"></script>
+		<script src="../../game/lib/text/score_board.js"></script>
+		<script src="../../game/lib/text/score_text.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/history_record_manager.js"></script>
 		<script src="../../game/lib/button/round_rect_button.js"></script>
@@ -99,7 +99,7 @@
 		<script src="../../game/typing/whac_a_mole/mole.js"></script>
 		<script src="../../game/typing/whac_a_mole/hammer.js"></script>
 		<script src="../../game/typing/whac_a_mole/loading.js"></script>
-		<script src="../../game/typing/whac_a_mole/game.js?update_date=191225"></script>
+		<script src="../../game/typing/whac_a_mole/game.js"></script>
 		<script src="../../game/typing/whac_a_mole/main.js"></script>
 
 
diff --git a/src/web/client/word_flyingsaucer.html b/src/web/client/word_flyingsaucer.html
index e2d5b03..a36e849 100644
--- a/src/web/client/word_flyingsaucer.html
+++ b/src/web/client/word_flyingsaucer.html
@@ -38,7 +38,7 @@
 		<script src="../../game/lib/session_storage_manager.js"></script>
 		<script src="../../game/lib/score_manager.js"></script>
 		<script src="../../game/lib/heart_manager.js"></script>
-		<script src="../../game/lib/global/global_variables.js?update_date=191224"></script>
+		<script src="../../game/lib/global/global_variables.js"></script>
 
 		<!-- library source files -->
 		<script src="../../game/lib/keyboard_shortcut.js"></script>
@@ -46,14 +46,14 @@
 		<script src="../../game/lib/util/number_util.js"></script>
 		<script src="../../game/lib/util/record_util.js"></script>
 
-		<script src="../../game/lib/text/input_type_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/center_message_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/game_over_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/time_over_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/score_board.js?update_date=191224"></script>
-		<script src="../../game/lib/text/score_text.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_top_ui.js?update_date=191224"></script>
-		<script src="../../game/lib/text/screen_bottom_ui.js?update_date=191224"></script>
+		<script src="../../game/lib/text/input_type_text.js"></script>
+		<script src="../../game/lib/text/center_message_text.js"></script>
+		<script src="../../game/lib/text/game_over_text.js"></script>
+		<script src="../../game/lib/text/time_over_text.js"></script>
+		<script src="../../game/lib/text/score_board.js"></script>
+		<script src="../../game/lib/text/score_text.js"></script>
+		<script src="../../game/lib/text/screen_top_ui.js"></script>
+		<script src="../../game/lib/text/screen_bottom_ui.js"></script>
 
 		<script src="../../game/lib/history_record_manager.js"></script>
 		<script src="../../game/lib/heart_gauge.js"></script>
@@ -91,7 +91,7 @@
 		<script src="../../game/typing/word_flyingsaucer/game_level_manager.js"></script>
 		<script src="../../game/typing/word_flyingsaucer/loading.js"></script>
 		<script src="../../game/typing/word_flyingsaucer/flyingsaucer.js"></script>
-		<script src="../../game/typing/word_flyingsaucer/game.js?update_date=191225"></script>
+		<script src="../../game/typing/word_flyingsaucer/game.js"></script>
 		<script src="../../game/typing/word_flyingsaucer/main.js"></script>