diff --git a/.gitignore b/.gitignore
index e5b0a5d6a..08de4d7e1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ config.php
 test
 sirgle
 sr_*
+google*
diff --git a/css/default.css b/css/default.css
index f2229f157..c8dfcfff2 100644
--- a/css/default.css
+++ b/css/default.css
@@ -117,6 +117,9 @@ a:active {color:#000;text-decoration:underline}
 #ft_copy p {margin:0 auto;width:980px;color:#4a9ab8}
 #ft_copy b {color:#fff}
 
+/* Mobile화면으로 */
+#g4s_cng {}
+
 /* 콘텐츠별 스타일 */
 /* 버튼 */
 .btn01 {display:inline-block;padding:0 10px;height:23px;border:1px solid #ccc !important;background:#fafafa !important;color:#000 !important;text-decoration:none !important;line-height:2.15em;vertical-align:middle}
diff --git a/css/mobile.css b/css/mobile.css
index 2d4dd77e6..2c3276ec5 100644
--- a/css/mobile.css
+++ b/css/mobile.css
@@ -94,6 +94,9 @@ pre {overflow-x:scroll;font-size:1.1em}
 #ft_copy p {padding:0.5em;color:#4a9ab8}
 #ft_copy b {color:#fff}
 
+/* PC화면으로 */
+#g4s_cng {}
+
 /* 버튼 */
 .btn01 {display:inline-block;padding:0 0.5em;height:2em;border:1px solid #ccc !important;background:#fafafa !important;color:#000 !important;font-size:1em;text-decoration:none !important;line-height:2em;vertical-align:middle}
 .btn01:focus,
diff --git a/mobile/tail.php b/mobile/tail.php
index dd2c4c288..f01a89ca7 100644
--- a/mobile/tail.php
+++ b/mobile/tail.php
@@ -37,7 +37,7 @@ if (!defined('_GNUBOARD_')) exit; // 개별 페이지 접근 불가
     </div>
 </footer>
 
-<a href="<?=$_SERVER['PHP_SELF'].($_SERVER['QUERY_STRING']?'?'.$_SERVER['QUERY_STRING'].'&amp;':'?').'device=pc';?>">PC 버전으로 보기</a>
+<a href="<?=$_SERVER['PHP_SELF'].($_SERVER['QUERY_STRING']?'?'.$_SERVER['QUERY_STRING'].'&amp;':'?').'device=pc';?>" id="g4s_cng">PC 버전으로 보기</a>
 
 <?
 include_once(G4_PATH."/tail.sub.php");
diff --git a/tail.php b/tail.php
index f804b56b3..b52dc28ea 100644
--- a/tail.php
+++ b/tail.php
@@ -30,7 +30,7 @@ if ($config['cf_include_tail']) {
 </footer>
 
 <?if(is_mobile()){?>
-<a href="<?=$_SERVER['PHP_SELF'].($_SERVER['QUERY_STRING']?'?'.$_SERVER['QUERY_STRING'].'&amp;':'?').'device=mobile';?>">모바일 버전으로 보기</a>
+<a href="<?=$_SERVER['PHP_SELF'].($_SERVER['QUERY_STRING']?'?'.$_SERVER['QUERY_STRING'].'&amp;':'?').'device=mobile';?>" id="g4s_cng">모바일 버전으로 보기</a>
 <?}?>
 
 <?