diff --git a/app/views/admin/announcements/edit_sort.html.erb b/app/views/admin/announcements/edit_sort.html.erb
index 2764a76..d0dab0f 100644
--- a/app/views/admin/announcements/edit_sort.html.erb
+++ b/app/views/admin/announcements/edit_sort.html.erb
@@ -18,6 +18,9 @@
 </div>
 <%= render partial: 'edit_sort' %>
 <script type="text/javascript">
+  function parse_val(val){
+    return (val == '') ? 0 : parseFloat(val);
+  }
   function update_sort(){
     var ids = $.map($('#sortable>tr'),function(v){return $(v).data('id')});
     $.ajax({
@@ -38,12 +41,18 @@
       }
     });
     $('.sort_number').change(function(){
-      var new_sort_number = parseFloat($(this).val());
-      var min_number = $('.sort_number').length;
-      var max_number = 0;
+      $(this).data('changed', true);
+    });
+    $('.sort_number').on('blur', function(){
+      if(!$(this).data('changed')) {
+        return;
+      }
+      var new_sort_number = parse_val($(this).val());
+      var min_number = 0;
+      var max_number = $('.sort_number').length;
       var pool = $('.sort_number').not(this);
       var same_order = pool.filter(function(){
-        var tmp_sort = parseFloat($(this).val());
+        var tmp_sort = parse_val($(this).val());
         if (tmp_sort<min_number){
           min_number = tmp_sort;
         }
@@ -52,59 +61,19 @@
         }
         return tmp_sort==new_sort_number
       });
-      var tmp_same_order = null;
-      if (same_order.length>0){
+      var tmp_same_order = $();
+      if (same_order.length>0) {
         tmp_same_order = same_order.eq(0);
         tmp_same_order.parents('tr').eq(0).before($(this).parents('tr').eq(0));
-      }else{
-        //ex. 1 2 3 5,insert 4
-        if (parseInt(pool.eq(0).val())<parseInt(pool.eq(-1).val())){ //asc
-          $.each(pool,function(){
-            var tmp_sort = parseFloat($(this).val());
-            if (new_sort_number>max_number){
-              if (tmp_sort<=new_sort_number){
-                tmp_same_order = $(this);
-              }
-            }else{
-              if (tmp_sort>=new_sort_number){
-                tmp_same_order = $(this);
-                return false;
-              }
-            }
-          });
-          if (new_sort_number>max_number){
-            tmp_same_order.parents('tr').eq(0).after($(this).parents('tr').eq(0));
-          }else{
-            tmp_same_order.parents('tr').eq(0).before($(this).parents('tr').eq(0));
-          }
-        }else{ //desc
-          //ex. 5 3 2 1,insert 4
-          $.each(pool,function(){
-            var tmp_sort = parseFloat($(this).val());
-            if (new_sort_number<min_number){
-              if (tmp_sort>=new_sort_number){
-                tmp_same_order = $(this);
-              }
-            }else if (new_sort_number>max_number){
-              if (tmp_sort<=new_sort_number){
-                tmp_same_order = $(this);
-                return false;
-              }
-            }else{
-              if (tmp_sort<=new_sort_number){
-                tmp_same_order = $(this);
-                return false;
-              }
-            }
-          });
-          if (new_sort_number<min_number){
-            tmp_same_order.parents('tr').eq(0).after($(this).parents('tr').eq(0));
-          }else{
-            tmp_same_order.parents('tr').eq(0).before($(this).parents('tr').eq(0));
-          }
-        }
+      } else if (new_sort_number>=max_number) {
+        tmp_same_order = pool.eq(-1);
+        tmp_same_order.parents('tr').eq(0).after($(this).parents('tr').eq(0));
+      } else if (new_sort_number<=min_number) {
+        tmp_same_order = pool.eq(0);
+        tmp_same_order.parents('tr').eq(0).before($(this).parents('tr').eq(0));
       }
       update_sort();
+      $(this).data('changed', false);
     });
   }
   $(document).ready(function(){
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 0f971ae..bb04029 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -92,6 +92,7 @@ en:
       file: File
       view_count: View Count
       department: Department
+      sort_number: Sort Number
     add_new: Add New
     export_to_excel: Export to Excel
     export_all_anns: Export all Announcement
diff --git a/config/locales/zh_tw.yml b/config/locales/zh_tw.yml
index 9935154..c4a5274 100644
--- a/config/locales/zh_tw.yml
+++ b/config/locales/zh_tw.yml
@@ -93,6 +93,7 @@ zh_tw:
       file: 檔案下載
       view_count: 瀏覽人次
       department: 單位
+      sort_number: 排序值
     add_new: 新建
     export_to_excel: 匯出至Excel檔
     export_all_anns: 匯出所有公告