diff --git a/assets/javascripts/app.js b/assets/javascripts/app.js
index ac567ce..2752921 100644
--- a/assets/javascripts/app.js
+++ b/assets/javascripts/app.js
@@ -718,12 +718,10 @@ function transdate(){
 
   // 當文件物件模型(DOM)載入後，執行init函數
   $(document).ready(function() {
-    $(document).on('keydown',function(event){
-      var keyCode = event.which ? event.which : event.keyCode;
-      if($(document.activeElement==document.body) && keyCode==9){
-        if (!$('header>.kenjohn').hasClass('navFixed')){
-          $('header>.kenjohn').addClass('navRel');
-        }
+    $(document).on('focus','*',function(){
+      if ($('header>.kenjohn').attr('class') == "kenjohn"){
+        $('header>.kenjohn').addClass('navRel');
+        $('#gotocenter').focus();
       }
     });
     $('.group').each(function(){
@@ -897,7 +895,12 @@ function transdate(){
       }
     });
 
-  $('#main-nav>li').mouseover(function(){
+  $('#main-nav>li').on('mouseover',function(){
+    if (!calc_menu_flag){
+      calc_menu_pos();
+    }
+  });
+  $('#main-nav>li>a').on('focus',function(){
     if (!calc_menu_flag){
       calc_menu_pos();
     }