diff --git a/app/views/origami/surveys/_form.html.erb b/app/views/origami/surveys/_form.html.erb
index 5640b549..52e8a517 100755
--- a/app/views/origami/surveys/_form.html.erb
+++ b/app/views/origami/surveys/_form.html.erb
@@ -9,12 +9,12 @@
             <div class="row clearfix">
               <div class="col-lg-6 col-md-6 col-sm-6 col-xs-6 ">
                 <div class="form-group p-l-10 p-r-10">
-                  <%= f.input :child, input_html: { value: @survey_data.child, class: 'col-md-10' }%>
+                  <%= f.input :child, input_html: { value: @survey_data.child, class: 'col-md-10', :onChange => "total_customer();" }%>
                 </div>
               </div>
               <div class="col-lg-6 col-md-6 col-sm-6 col-xs-6 ">
                 <div class="form-group p-l-10 p-r-10">
-                  <%= f.input :adult, input_html: { value: @survey_data.adult, class: 'col-md-10' }%>
+                  <%= f.input :adult, input_html: { value: @survey_data.adult, class: 'col-md-10', :onChange => "total_customer();" }%>
                 </div>
               </div>
             </div>  
@@ -30,7 +30,7 @@
                 </div>
               </div>
             </div>   
-            <%= f.input :total_customer, input_html: { value: @survey_data.total_customer, class: 'col-md-11'} %>
+            <%= f.input :total_customer, input_html: { value:@survey_data.total_customer , :readonly => true, class: 'col-md-11'} %>
             <%= f.input :local , input_html: { value: @survey_data.local, class: 'col-md-11' }%>
             <!--<fieldset style="border: 1px solid #BDBDBD;padding: 20px; width: 92%;margin: 20px 0 20px 0;"> -->
               <!-- <legend style="font-size: 1.2em !important;font-weight: bold !important;text-align: left !important;border:none;width:100px;">Foreigner</legend> -->
@@ -457,4 +457,11 @@ var cashier_type = "<%= @cashier_type %>";
       });
     }
   }
+
+  function total_customer(){
+    var child = $("#survey_child").val() || 0;
+    var adult = $("#survey_adult").val() || 0;
+    var result = parseInt(child) + parseInt(adult);
+    $("#survey_total_customer").val(result);
+  }
 </script>
\ No newline at end of file