Fix: update best record for every hour

src/game/start/start.js

@@ -16,6 +16,11 @@ class Start {
 
 		// top
 		let backButton = new BackButton( () => {
+			sessionStorageManager.playingAppName = null;
+			sessionStorageManager.playingAppKoreanName = null;
+			sessionStorageManager.record = null;
+			sessionStorageManager.bestRecord = null;
+
 			location.href = '../../web/client/menu_app.html';
 		});
 
@@ -26,6 +31,7 @@ class Start {
 		// this.printHowToPlay(appInfoManager.getHowToPlayText(sessionStorageManager.playingAppName));
 		this.loadHowToPlay(sessionStorageManager.playingAppID);
 		this.makeStartButton();
+
 		let today = new Date();
 		let date = DateUtil.getYYYYMMDD(today);
 		this.dbConnectManager.requestPlayerHistory(
@@ -71,6 +77,11 @@ class Start {
 				sessionStorageManager.BestRecord = Number(replyJSON["BestRecord"]);
 				let highScoreWithCommas = NumberUtil.numberWithCommas(sessionStorageManager.BestRecord);
 				screenBottom.printBottomLeftText("오늘의 최고 기록 : " + highScoreWithCommas);
+			},
+			replyJSON => {	// no data
+				sessionStorageManager.BestRecord = 0;
+				let highScoreWithCommas = NumberUtil.numberWithCommas(sessionStorageManager.BestRecord);
+				screenBottom.printBottomLeftText("오늘의 최고 기록 : " + highScoreWithCommas);
 			}
 		);
 	}