diff --git a/src/main/webapp/resources/css/styles.css b/src/main/webapp/resources/css/styles.css
index eb66656..7ec201f 100644
--- a/src/main/webapp/resources/css/styles.css
+++ b/src/main/webapp/resources/css/styles.css
@@ -1,7 +1,5 @@
 @CHARSET "UTF-8";
 
-.hidden {display: none;}
-
 *[onclick], *[href] {cursor:pointer;}
 
 .wait {
diff --git a/src/main/webapp/resources/html/dialog.html b/src/main/webapp/resources/html/dialog.html
index c8b4ed6..f187584 100644
--- a/src/main/webapp/resources/html/dialog.html
+++ b/src/main/webapp/resources/html/dialog.html
@@ -7,7 +7,7 @@
       </div>
       <div class="modal-body" style="min-height: 10em; min-width: 30%; overflow-y: auto;max-height: 800px;">
       </div>
-      <div class="modal-footer text-end hidden">
+      <div hidden class="modal-footer text-end">
         <button type="button" class="btn btn-primary">확인</button>
       </div>
     </div>
diff --git a/src/main/webapp/resources/js/base/base.js b/src/main/webapp/resources/js/base/base.js
index 9127454..f0bd508 100644
--- a/src/main/webapp/resources/js/base/base.js
+++ b/src/main/webapp/resources/js/base/base.js
@@ -199,7 +199,7 @@ var dialog = {
 		
 		if (conf.onOK) {
 			let footer = dlg.find(".modal-footer");
-			footer.removeClass("hidden");
+			footer.hidden = false;
 			footer.show();
 			footer.find("button").unbind("click").click(function() {
 				if (conf.getData) {