diff --git a/app/controllers/seminars_controller.rb b/app/controllers/seminars_controller.rb
index 2bf9443..24634e2 100644
--- a/app/controllers/seminars_controller.rb
+++ b/app/controllers/seminars_controller.rb
@@ -383,7 +383,7 @@ class SeminarsController < ApplicationController
 
     referer_url = OrbitHelper.request.referer
 
-    if (referer_url.nil? || referer_url.match(/(\?|&)method=show_privacy/).nil?) && !OrbitHelper.request.flash[:notice]
+    if (referer_url.nil? || referer_url.match(/(\?|&)method=show_privacy/).nil?) && !OrbitHelper.request.params[:notice]
       return {
         "seminar" => seminar,
         "seminar_signup" => seminar_signup,
@@ -443,7 +443,7 @@ class SeminarsController < ApplicationController
     if @seminar.enable_recaptcha && (!gotcha_valid?)
       notice_words = t('recaptcha.errors.verification_failed')
       referer_url = get_referer_url_for_notice(notice_words)
-      redirect_to referer_url, :notice => notice_words
+      show_alert(notice_words)
       return
     end
     signup_limit = @seminar.signup_limit
@@ -462,7 +462,7 @@ class SeminarsController < ApplicationController
           else
             notice_words = t('seminar.sign_up_is_full')
             referer_url = get_referer_url_for_notice(notice_words)
-            redirect_to referer_url, :notice => notice_words
+            show_alert(notice_words)
             return
           end
         end
@@ -471,7 +471,7 @@ class SeminarsController < ApplicationController
         if signup_limit <= signup_count
           notice_words = t('seminar.sign_up_is_full')
           referer_url = get_referer_url_for_notice(notice_words)
-          redirect_to referer_url, :notice => notice_words
+          show_alert(notice_words)
           return
         end
       end
@@ -518,7 +518,9 @@ class SeminarsController < ApplicationController
         end
         send_mail('signup',params[:seminar_signup][:email],params[:seminar_signup][:seminar_main_id],extra_text)
       end
-      redirect_to "#{params[:referer_url].to_s.chomp('/').gsub(/\/([^\/?#]+)(|[^\/]+)$/){|f| '/'+$1}}?method=signup_ok#{status_param}&serial_number=#{@seminar_signup.display_serial_number}&seminar=#{@seminar.uid}"
+
+      redirect_with_js("#{params[:referer_url].to_s.chomp('/').gsub(/\/([^\/?#]+)(|[^\/]+)$/){|f| '/'+$1}}?method=signup_ok#{status_param}&serial_number=#{@seminar_signup.display_serial_number}&seminar=#{@seminar.uid}")
+
     else
       if has_counter
         OrbitHelper::SharedMutex.synchronize do
@@ -528,11 +530,11 @@ class SeminarsController < ApplicationController
       if !not_signup_yet
         notice_words = t('seminar.email_exist')
         referer_url = get_referer_url_for_notice(notice_words)
-        redirect_to referer_url, :notice => notice_words
+        show_alert(notice_words)
       else
         notice_words = t('seminar.sign_up_failed')
         referer_url = get_referer_url_for_notice(notice_words)
-        redirect_to referer_url, :notice => notice_words
+        show_alert(notice_words)
       end
     end
 
@@ -572,7 +574,7 @@ class SeminarsController < ApplicationController
       end
       send_mail('signup',tmp_seminar_signup_params[:email],tmp_seminar_signup_params[:seminar_main_id],extra_text)
     end
-    redirect_to "#{params[:referer_url].to_s.chomp('/').gsub(/\/([^\/?#]+)(|[^\/]+)$/){|f| '/'+$1}}?method=con_upload"
+    redirect_with_js("#{params[:referer_url].to_s.chomp('/').gsub(/\/([^\/?#]+)(|[^\/]+)$/){|f| '/'+$1}}?method=con_upload")
   end
 
   def signup_ok
@@ -934,4 +936,20 @@ class SeminarsController < ApplicationController
   def seminar_signup_values_params
     params.require(:seminar_signup_values).permit!
   end
+
+  private
+  def show_alert(notice_words)
+    respond_to do |format|
+      format.js{
+        render :js => "alert('#{notice_words}');"
+      }
+    end
+  end
+  def redirect_with_js(url)
+    respond_to do |format|
+      format.js{
+        render :js => "window.location.href = '#{url}';"
+      }
+    end
+  end
 end
diff --git a/app/views/seminars/edit_login_seminar_signup.html.erb b/app/views/seminars/edit_login_seminar_signup.html.erb
index 2e95b22..bdc4d42 100644
--- a/app/views/seminars/edit_login_seminar_signup.html.erb
+++ b/app/views/seminars/edit_login_seminar_signup.html.erb
@@ -58,7 +58,7 @@
     margin: 0;
   }
 </style>
-<%= form_for @seminar_signup, url: (@seminar_signup.new_record? ? seminars_path : update_signup_form_seminars_path), html: {class: "content form-horizontal" , :id=>"new-seminar-signup", multipart: true} do |f| %>
+<%= form_for @seminar_signup, url: (@seminar_signup.new_record? ? seminars_path : update_signup_form_seminars_path), html: {class: "content form-horizontal" , :id=>"new-seminar-signup", multipart: true, :remote=>true} do |f| %>
   <fieldset>
     
       <!-- Title -->
@@ -315,22 +315,42 @@
     for (var i=0;i< all_values.length;i++){
       if (values.includes(all_values[i][1])){
         all_values[i][0].setCustomValidity("<%= t('seminar.repeat_hint') %>");
-        all_values[i][0].reportValidity();
+        all_values[i][0].focus();
+        $(all_values[i][0]).parents('form')[0].reportValidity();
         validated = false;
-        window.setTimeout(function(){
-          all_values[i][0].setCustomValidity("");
-        }, 500);
+        $(all_values[i][0]).one('keyup change', function(){
+          this.setCustomValidity("");
+        });
         break;
       }
       values.push(all_values[i][1]);
     }
     return validated;
   }
+  function uploadSubmit(form){
+    $.ajax({
+      type: 'post',
+      method: 'post',
+      async: false,
+      contentType: false,
+      processData: false,
+      dataType: "script",
+      url: $(form).attr('action'),
+      data: new FormData(form)
+    });
+  }
   $(".rucaptcha-image").siblings("input[type=\"text\"]").attr("placeholder","Verification");
   var validated = false,
       chks = false,
       pwd = $('#seminar_signup_password')
-
+  $('input[type=submit]').on('click', function(){
+    var form = $(this).parents('form')[0];
+    if (form){
+      window.setTimeout(function(){        
+        form.reportValidity();
+      }, 500);
+    }
+  });
   $("form.content").submit(function(event) {
     if (!check_repeat_value(event)){
       return false;
@@ -376,6 +396,9 @@
       return false;
     }
 
+    uploadSubmit(this);
+    return false;
+
   });
 
   $('input[type="email"]').blur(function(){
@@ -429,34 +452,43 @@
   // $("#seminar_signup_values_3_value").removeAttr("placeholder");
 
   let currentGroup = 1 + $("#new-seminar-signup div[id^=group]:visible").length;
+  function showGroup($group){
+    $group.show();
+    $group.find('.fake-clean-file').remove();
+    $group.find('input,textarea').attr("required", true);
+  }
+
+  function hideGroup($group){
+    $group.hide();
+    $group.find("input[type!=hidden], textarea").val("");
+    $.each($group.find("input[type=file]"), function(k, v) {
+      $(v).after("<input class=\"fake-clean-file\" type=\"hidden\" name=\""+$(v).attr('name')+"\" value=\"\">");
+    });
+    $group.find('input,textarea').attr("required", false);
+  }
+
   if (currentGroup > 1){
     $("#remove-member").show();
+    for (var i = 1; i < currentGroup; i++){
+      showGroup($("#group" + i));
+    }
   }
+
   $("#add-member").on("click",function () {
     if(currentGroup < 5){
       $("#remove-member").show();
       currentGroup++;
-      $("#group" + currentGroup).show();
-      $("#group" + currentGroup + " .fake-clean-file").remove();
       if(currentGroup == 5){
         $(this).hide();
       }
     }
-    $("#group" + currentGroup + " input").attr("required", true);
-    $("#group" + currentGroup + " textarea").attr("required", true);
+    showGroup($("#group" + currentGroup));
     return false;
   })
   $("#remove-member").on("click",function () {
     $("#add-member").show();
     if(currentGroup > 0){
-      $("#group" + currentGroup).hide();
-      $("#group" + currentGroup + " input").attr("required", false);
-      $("#group" + currentGroup + " input[type!=hidden]").val("");
-      $.each($("#group" + currentGroup + " input[type=file]"), function(k, v) {
-        $(v).after("<input class=\"fake-clean-file\" type=\"hidden\" name=\""+$(v).attr('name')+"\" value=\"\">");
-      });
-      $("#group" + currentGroup + " textarea").attr("required", false);
-      $("#group" + currentGroup + " textarea").val("");
+      hideGroup($("#group" + currentGroup));
       currentGroup--;
       if(currentGroup == 1){
         $(this).hide();
diff --git a/app/views/seminars/show.html.erb b/app/views/seminars/show.html.erb
index 2e95b22..bdc4d42 100644
--- a/app/views/seminars/show.html.erb
+++ b/app/views/seminars/show.html.erb
@@ -58,7 +58,7 @@
     margin: 0;
   }
 </style>
-<%= form_for @seminar_signup, url: (@seminar_signup.new_record? ? seminars_path : update_signup_form_seminars_path), html: {class: "content form-horizontal" , :id=>"new-seminar-signup", multipart: true} do |f| %>
+<%= form_for @seminar_signup, url: (@seminar_signup.new_record? ? seminars_path : update_signup_form_seminars_path), html: {class: "content form-horizontal" , :id=>"new-seminar-signup", multipart: true, :remote=>true} do |f| %>
   <fieldset>
     
       <!-- Title -->
@@ -315,22 +315,42 @@
     for (var i=0;i< all_values.length;i++){
       if (values.includes(all_values[i][1])){
         all_values[i][0].setCustomValidity("<%= t('seminar.repeat_hint') %>");
-        all_values[i][0].reportValidity();
+        all_values[i][0].focus();
+        $(all_values[i][0]).parents('form')[0].reportValidity();
         validated = false;
-        window.setTimeout(function(){
-          all_values[i][0].setCustomValidity("");
-        }, 500);
+        $(all_values[i][0]).one('keyup change', function(){
+          this.setCustomValidity("");
+        });
         break;
       }
       values.push(all_values[i][1]);
     }
     return validated;
   }
+  function uploadSubmit(form){
+    $.ajax({
+      type: 'post',
+      method: 'post',
+      async: false,
+      contentType: false,
+      processData: false,
+      dataType: "script",
+      url: $(form).attr('action'),
+      data: new FormData(form)
+    });
+  }
   $(".rucaptcha-image").siblings("input[type=\"text\"]").attr("placeholder","Verification");
   var validated = false,
       chks = false,
       pwd = $('#seminar_signup_password')
-
+  $('input[type=submit]').on('click', function(){
+    var form = $(this).parents('form')[0];
+    if (form){
+      window.setTimeout(function(){        
+        form.reportValidity();
+      }, 500);
+    }
+  });
   $("form.content").submit(function(event) {
     if (!check_repeat_value(event)){
       return false;
@@ -376,6 +396,9 @@
       return false;
     }
 
+    uploadSubmit(this);
+    return false;
+
   });
 
   $('input[type="email"]').blur(function(){
@@ -429,34 +452,43 @@
   // $("#seminar_signup_values_3_value").removeAttr("placeholder");
 
   let currentGroup = 1 + $("#new-seminar-signup div[id^=group]:visible").length;
+  function showGroup($group){
+    $group.show();
+    $group.find('.fake-clean-file').remove();
+    $group.find('input,textarea').attr("required", true);
+  }
+
+  function hideGroup($group){
+    $group.hide();
+    $group.find("input[type!=hidden], textarea").val("");
+    $.each($group.find("input[type=file]"), function(k, v) {
+      $(v).after("<input class=\"fake-clean-file\" type=\"hidden\" name=\""+$(v).attr('name')+"\" value=\"\">");
+    });
+    $group.find('input,textarea').attr("required", false);
+  }
+
   if (currentGroup > 1){
     $("#remove-member").show();
+    for (var i = 1; i < currentGroup; i++){
+      showGroup($("#group" + i));
+    }
   }
+
   $("#add-member").on("click",function () {
     if(currentGroup < 5){
       $("#remove-member").show();
       currentGroup++;
-      $("#group" + currentGroup).show();
-      $("#group" + currentGroup + " .fake-clean-file").remove();
       if(currentGroup == 5){
         $(this).hide();
       }
     }
-    $("#group" + currentGroup + " input").attr("required", true);
-    $("#group" + currentGroup + " textarea").attr("required", true);
+    showGroup($("#group" + currentGroup));
     return false;
   })
   $("#remove-member").on("click",function () {
     $("#add-member").show();
     if(currentGroup > 0){
-      $("#group" + currentGroup).hide();
-      $("#group" + currentGroup + " input").attr("required", false);
-      $("#group" + currentGroup + " input[type!=hidden]").val("");
-      $.each($("#group" + currentGroup + " input[type=file]"), function(k, v) {
-        $(v).after("<input class=\"fake-clean-file\" type=\"hidden\" name=\""+$(v).attr('name')+"\" value=\"\">");
-      });
-      $("#group" + currentGroup + " textarea").attr("required", false);
-      $("#group" + currentGroup + " textarea").val("");
+      hideGroup($("#group" + currentGroup));
       currentGroup--;
       if(currentGroup == 1){
         $(this).hide();