diff --git a/src/web/client/menu_app_play_free.html b/src/web/client/menu_app_play_free.html
new file mode 100644
index 0000000..2bbf190
--- /dev/null
+++ b/src/web/client/menu_app_play_free.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<html>
+	<head>
+		<meta charset="UTF-8">
+		<title>메뉴</title>
+
+
+		<!-- <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script> -->
+		<!-- <script src="https://cdnjs.cloudflare.com/ajax/libs/phaser/2.6.2/phaser.js"></script> -->
+		<script src="../../../resources/js/phaser.min.js"></script>
+
+		<!-- global source files -->
+		<script src="../../game/lib/session_storage_manager.js"></script>
+		<script src="../../game/global/global_variables.js"></script>
+
+		<!-- library source files -->
+		<script src="../../game/lib/input_type_text.js"></script>
+		<script src="../../game/lib/round_rect_button.js"></script>
+		<script src="../../game/lib/back_button.js"></script>
+		<script src="../../game/lib/fullscreen_button.js"></script>
+		<script src="../../game/lib/app_button.js"></script>
+		<script src="../../game/lib/game_app_button.js"></script>
+		<script src="../../game/lib/screen_bottom.js"></script>
+		<script src="../../game/lib/db_connect_manager.js"></script>
+
+		<!-- source files -->
+		<script src="../../game/menu/menu_app.js"></script>
+		<script src="../../game/menu/main_menu_app.js"></script>
+
+
+		<style>
+			body{
+				padding: 0;
+				margin: 0;
+			}
+
+			canvas{
+				margin: 0 auto;
+			}
+		</style>
+	</head>
+
+	<body>
+		<div id="MenuApp" style="text-align:center;" />
+	</body>
+</html>
\ No newline at end of file
diff --git a/src/web/js/main.js b/src/web/js/main.js
index fd8ee27..63f8bd9 100644
--- a/src/web/js/main.js
+++ b/src/web/js/main.js
@@ -15,17 +15,46 @@ function loadMaestroID() {
 	console.log("loaded maestroID : " + maestroID);
 }
 
-function saveMaestroID() {
+function saveMaestroID(maestroID) {
 	sessionStorage.setItem("maestroID", maestroID);
-	console.log("saved maestroID : " + maestroID);
+	// console.log("saved maestroID : " + maestroID);
+}
+
+function getParentDirectory(url) {
+	let directories = url.split("/");
+	if(directories.length < 2)
+		return "";
+
+	return directories[directories.length - 2];
+}
+
+function getPage(url) {
+	let directories = url.split("/");
+	if(directories.length < 1)
+		return "";
+
+	return directories[directories.length - 1];
 }
 
 function goHome() {
-	if(maestroID === -1) {
-		location.href = "./../main/index.html";
-	} else {
-		location.href = "./../maestro/main_menu.html";
+	let url = window.location.href;
+
+	if(getParentDirectory(url) === "maestro") {
+		if(getPage(url) !== "main_menu.html")
+			location.href = "./../maestro/main_menu.html";
+
+		return;
 	}
+
+	// parent directory is "main"
+	if(getPage(url) === "faq.html") {
+		if(maestroID === -1) {
+			location.href = "./../main/index.html";
+		} else {
+			location.href = "./../maestro/main_menu.html";
+		}
+	} else if(getPage(url) !== "index.html")
+		location.href = "./../main/index.html";
 }
 
 function logout() {
diff --git a/src/web/main/index.html b/src/web/main/index.html
index 7fe16a7..bed4bf5 100644
--- a/src/web/main/index.html
+++ b/src/web/main/index.html
@@ -10,8 +10,12 @@
 
 	<script type="text/javascript" src="./../../../resources/jquery/jquery-3.3.1.min.js"></script>
 	<script type="text/javascript" src="./../js/main.js"></script>
+	<script type="text/javascript" src="./../js/request_server.js"></script>
 	<script type="text/javascript">
+		saveMaestroID(-1);
+
 		$(document).ready(function() {
+
 			$("#header").load("./../module/header.html");
 			$("#section").load("./../module/home_section.html");
 			$("#footer").load("./../module/footer.html");
diff --git a/src/web/maestro/login.html b/src/web/main/login.html
similarity index 100%
rename from src/web/maestro/login.html
rename to src/web/main/login.html
diff --git a/src/web/maestro/register.html b/src/web/main/register.html
similarity index 100%
rename from src/web/maestro/register.html
rename to src/web/main/register.html
diff --git a/src/web/module/header.html b/src/web/module/header.html
index d78f78e..9935d2c 100644
--- a/src/web/module/header.html
+++ b/src/web/module/header.html
@@ -38,7 +38,7 @@
 			</li>
 			<li>
 				<span class="col">
-					<a href="./../maestro/login.html" id="login_maestro" class="btn btn-sea">마에스트로 계정<br/>로그인</a>
+					<a href="./../main/login.html" id="login_maestro" class="btn btn-sea">마에스트로 계정<br/>로그인</a>
 				</span>
 			</li>
 		</ul>
diff --git a/src/web/module/home_section.html b/src/web/module/home_section.html
index 36ae8a9..9797bc3 100644
--- a/src/web/module/home_section.html
+++ b/src/web/module/home_section.html
@@ -15,40 +15,14 @@
 <script>
 
 function loadMaestroTestAccountInfo() {
-	let xhr = new XMLHttpRequest(); //new로 생성.
-	xhr.open('POST', './../server/maestro/maestro_test_account.php', true);
-	xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
-	xhr.send();
-	xhr.onload = function() {
-		if(xhr.readyState === 4 && xhr.status === 200) {
-			// console.log(xhr.responseText);
-			// console.log(xhr.responseText.length);
-			if(xhr.responseText.length === 0 || xhr.responseText === null) {
-				console.log("no data from server");
-				return;
-			}
+	sendRequestServer(	//url, sendParams, onSuccess, onFail, isDebugMode);
+		"./../server/maestro/maestro_test_account.php",
+		"",
 
-			let replyJSON = JSON.parse(xhr.responseText);
-			// console.log(replyJSON);
-
-			if(replyJSON === null) {
-				console.log("no data from server");
-				return;
-			}
-
-			if(replyJSON["ERROR"] !== undefined || replyJSON["RESULT"] === undefined) {
-				console.log(replyJSON["ERROR"]);
-				return;
-			}
-
-			if(replyJSON["RESULT"] === "fail") {
-				console.log(replyJSON["RESULT"]);
-				return;
-			}
-
-			let maestroID = replyJSON["maestroID"];
-			let playerID = replyJSON["playerID"];
-			let playerName = replyJSON["playerName"];
+		(jsonData) => {
+			let maestroID = jsonData["maestroID"];
+			let playerID = jsonData["playerID"];
+			let playerName = jsonData["playerName"];
 
 			console.log("maestroID : " + maestroID);
 			console.log("playerID : " + playerID);
@@ -57,13 +31,22 @@ function loadMaestroTestAccountInfo() {
 			sessionStorage.setItem("maestroID", maestroID);
 			sessionStorage.setItem("playerID", playerID);
 			sessionStorage.setItem("playerName", playerName);
+		},
+
+		(errorMessage) => {
+			if($("#error_message").length) {
+				$("#error_message").text(errorMessage);
+			}
 		}
-	}
+
+	);
+	let xhr = new XMLHttpRequest(); //new로 생성.
 }
 
 function playFree() {
 	loadMaestroTestAccountInfo();
-	window.open("./../client/menu_app.html", "_blank");
+	// window.open("./../client/menu_app.html", "_blank");
+	location.href = "./../client/menu_app.html";
 }
 
 function experienceMaestro() {
@@ -116,7 +99,7 @@ function experienceMaestro() {
 		</ul>
 
 		<div class="col alignCenter">
-			<a href="./../maestro/register.html" id="maestro_register" class="btn btn-sea width400">마에스트로<br/>가입</a>
+			<a href="./../main/register.html" id="maestro_register" class="btn btn-sea width400">마에스트로<br/>가입</a>
 		</div>
 
 		<ul id="register_tip">
diff --git a/src/web/module/maestro_header.html b/src/web/module/maestro_header.html
index 45561ba..803e1a4 100644
--- a/src/web/module/maestro_header.html
+++ b/src/web/module/maestro_header.html
@@ -24,6 +24,30 @@
 <script type="text/javascript">
 
 function loadMaestroTestAccountInfo() {
+	sendRequestServer(	//url, sendParams, onSuccess, onFail, isDebugMode);
+		"./../server/maestro/maestro_test_player.php",
+		"maestro_id=" + maestroID,
+
+		(jsonData) => {
+			let playerID = jsonData["playerID"];
+			let playerName = jsonData["playerName"];
+
+			console.log("playerID : " + playerID);
+			console.log("playerName : " + playerName);
+
+			sessionStorage.setItem("playerID", playerID);
+			sessionStorage.setItem("playerName", playerName);
+		},
+
+		(errorMessage) => {
+			if($("#error_message").length) {
+				$("#error_message").text(errorMessage);
+			}
+		}
+
+	);
+
+/*
 	let xhr = new XMLHttpRequest(); //new로 생성.
 	xhr.open('POST', './../server/maestro/maestro_test_player.php', true);
 	xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
@@ -65,6 +89,7 @@ function loadMaestroTestAccountInfo() {
 			sessionStorage.setItem("playerName", playerName);
 		}
 	}
+	*/
 }
 
 function runMaestroAccountApp() {
@@ -75,7 +100,23 @@ function runMaestroAccountApp() {
 function deleteMaestroAllRecords() {
 	// alert("마에스트로 전용 계정의 모든 플레이 기록이 지워집니다.\n예) 게임 기록, 타자 타수, 순위 등");
 	if(confirm("마에스트로 전용 계정의 모든 플레이 기록이 지워집니다.\n예) 게임 기록, 타자 타수, 순위 등")) {
-		let xhr = new XMLHttpRequest(); //new로 생성.
+		sendRequestServer(	//url, sendParams, onSuccess, onFail, isDebugMode);
+			"./../server/maestro/delete_test_player_record.php",
+			"maestro_id=" + maestroID,
+
+			(jsonData) => {
+				alert("마에스트로 전용 계정의 모든 플레이 기록이 지워졌습니다.");
+			},
+
+			(errorMessage) => {
+				if($("#error_message").length) {
+					$("#error_message").text(errorMessage);
+				}
+			}
+
+		);
+
+/*		let xhr = new XMLHttpRequest(); //new로 생성.
 		xhr.open('POST', './../server/maestro/delete_test_player_record.php', true);
 		xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
 		xhr.send("maestro_id=" + maestroID);
@@ -87,6 +128,7 @@ function deleteMaestroAllRecords() {
 		}
 
 		alert("마에스트로 전용 계정의 모든 플레이 기록이 지워졌습니다.");
+		*/
 	} else {
 	}
 }
diff --git a/src/web/server/maestro/maestro_test_account.php b/src/web/server/maestro/maestro_test_account.php
index 7d037b7..b880189 100644
--- a/src/web/server/maestro/maestro_test_account.php
+++ b/src/web/server/maestro/maestro_test_account.php
@@ -1,42 +1,30 @@
 <?php
-header('Content-Type: application/json');
-
-/*
-if(!is_numeric($enterCode)) {
-    send_error_code('생년월일이 숫자가 아닙니다. : '.$enterCode);
-    exit;
-} else if(strlen($enterCode) != 6) {
-    send_error_code('6자리 숫자값을 정확히 입력하세요 : YYMMDD (예 : 120131) : '.$enterCode);
-    exit;
-}
-*/
+header("Content-Type: application/json");
 
+include "./../lib/send_reply_json.php";
 include "./../setup/connect_db.php";
 
+
 $maestro_test_account_id = get_maestro_test_account_id("test");
 if($maestro_test_account_id === null) {
-	$replyJSON["ERROR"] = "등록된 마에스트로 관리자 계정이 없습니다. (".$maestro_test_account_id.")";
-	echo json_encode($replyJSON, JSON_UNESCAPED_UNICODE);
-	$db_conn->close();
+	set_error_message("등록된 마에스트로 관리자 계정이 없습니다. (".$maestro_test_account_id.")");
+	send_result_fail();
 	exit;
 }
 
 $maestro_test_player_id = get_maestro_test_player_id($maestro_test_account_id);
 if($maestro_test_player_id === null) {
-	$replyJSON["ERROR"] = "등록된 마에스트로 테스트 계정이 없습니다. (".$maestro_test_player_id.")";
-	echo json_encode($replyJSON, JSON_UNESCAPED_UNICODE);
-	$db_conn->close();
+	set_error_message("등록된 마에스트로 관리자 계정이 없습니다. (".$maestro_test_account_id.")");
+	send_result_fail();
 	exit;
 }
 
 $maestro_test_player_name = get_maestro_test_player_name($maestro_test_player_id);
 
-$replyJSON["maestroID"] = $maestro_test_account_id;
-$replyJSON["playerID"] = $maestro_test_player_id;
-$replyJSON["playerName"] = $maestro_test_player_name;
-$replyJSON["RESULT"] = "ok";
-echo json_encode($replyJSON, JSON_UNESCAPED_UNICODE);
-$db_conn->close();
+set_data("maestroID", $maestro_test_account_id);
+set_data("playerID", $maestro_test_player_id);
+set_data("playerName", $maestro_test_player_name);
+send_result_success();
 exit;
 
 
@@ -45,7 +33,7 @@ function get_maestro_test_account_id($maestro_name) {
 
 	$query = "SELECT MaestroID FROM moty_maestro WHERE Name=?";
 	$stmt = $db_conn->prepare($query);
-	$stmt->bind_param('s', $maestro_name);
+	$stmt->bind_param("s", $maestro_name);
 	$stmt->execute();
 	$stmt->bind_result($maestro_test_account_id);
 	// while($stmt->fetch()) {
@@ -62,7 +50,7 @@ function get_maestro_test_player_id($maestro_id) {
 
 	$query = "SELECT MaestroTestID FROM moty_maestro WHERE MaestroID=?";
 	$stmt = $db_conn->prepare($query);
-	$stmt->bind_param('i', $maestro_id);
+	$stmt->bind_param("i", $maestro_id);
 	$stmt->execute();
 	$stmt->bind_result($maestro_test_player_id);
 	// while($stmt->fetch()) {
@@ -79,7 +67,7 @@ function get_maestro_test_player_name($player_id) {
 
 	$query = "SELECT Name FROM moty_player WHERE PlayerID=?";
 	$stmt = $db_conn->prepare($query);
-	$stmt->bind_param('i', $player_id);
+	$stmt->bind_param("i", $player_id);
 	$stmt->execute();
 	$stmt->bind_result($maestro_test_player_name);
 	// while($stmt->fetch()) {
diff --git a/src/web/server/maestro/maestro_test_player.php b/src/web/server/maestro/maestro_test_player.php
index 0be8cfc..780e9c0 100644
--- a/src/web/server/maestro/maestro_test_player.php
+++ b/src/web/server/maestro/maestro_test_player.php
@@ -1,43 +1,34 @@
 <?php
-header('Content-Type: application/json');
+header("Content-Type: application/json");
+
+include "./../lib/send_reply_json.php";
+include "./../setup/connect_db.php";
 
 $maestro_id = $_POST["maestro_id"];
-/*
-if(!is_numeric($enterCode)) {
-    send_error_code('생년월일이 숫자가 아닙니다. : '.$enterCode);
-    exit;
-} else if(strlen($enterCode) != 6) {
-    send_error_code('6자리 숫자값을 정확히 입력하세요 : YYMMDD (예 : 120131) : '.$enterCode);
-    exit;
-}
-*/
 
-include "./../setup/connect_db.php";
 
 $maestro_test_player_id = get_maestro_test_player_id($maestro_id);
 if($maestro_test_player_id === null) {
-	$replyJSON["ERROR"] = "등록된 마에스트로 테스트 계정이 없습니다";
-	echo json_encode($replyJSON, JSON_UNESCAPED_UNICODE);
-	$db_conn->close();
+	set_error_message("등록된 마에스트로 테스트 계정이 없습니다");
+	send_result_fail();
 	exit;
 }
 
 $maestro_test_player_name = get_maestro_test_player_name($maestro_test_player_id);
 
-$replyJSON["PlayerID"] = $maestro_test_player_id;
-$replyJSON["PlayerName"] = $maestro_test_player_name;
-$replyJSON["RESULT"] = "ok";
-echo json_encode($replyJSON, JSON_UNESCAPED_UNICODE);
-$db_conn->close();
+set_data("playerID", $maestro_test_player_id);
+set_data("playerName", $maestro_test_player_name);
+send_result_success();
 exit;
 
 
+
 function get_maestro_test_player_id($maestro_id) {
 	global $db_conn;
 
 	$query = "SELECT MaestroTestID FROM moty_maestro WHERE MaestroID=?";
 	$stmt = $db_conn->prepare($query);
-	$stmt->bind_param('i', $maestro_id);
+	$stmt->bind_param("i", $maestro_id);
 	$stmt->execute();
 	$stmt->bind_result($maestro_test_player_id);
 	// while($stmt->fetch()) {
@@ -54,7 +45,7 @@ function get_maestro_test_player_name($player_id) {
 
 	$query = "SELECT Name FROM moty_player WHERE PlayerID=?";
 	$stmt = $db_conn->prepare($query);
-	$stmt->bind_param('i', $player_id);
+	$stmt->bind_param("i", $player_id);
 	$stmt->execute();
 	$stmt->bind_result($maestro_test_player_name);
 	// while($stmt->fetch()) {
