diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 12852c63d..e79ca2caa 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -261,6 +261,25 @@ class CoursesController < ApplicationController
     @membercount = @members.count
     @course_groups = @course.course_groups
   end
+
+  def  valid_ajax
+    req = Hash.new(false)
+    req[:message] = ''
+
+    valid_attr = params[:valid]
+    valid_value = params[:value]
+
+    faker = CourseGroup.new
+
+    if valid_attr.eql?('name')
+      faker.name = valid_value
+      faker.valid?
+      req[:valid] = faker.errors[:name].blank?
+      req[:message] = faker.errors[:name]
+    end
+    req[:message] = l(:modal_valid_passing) if req[:message].blank?
+    render :json => req
+  end
   def join_group
     @subPage_title = l :label_student_list
     group = CourseGroup.find(params[:object_id])
diff --git a/app/views/courses/member.html.erb b/app/views/courses/member.html.erb
index b426e4a3e..ab95f5fdc 100644
--- a/app/views/courses/member.html.erb
+++ b/app/views/courses/member.html.erb
@@ -1,3 +1,22 @@
+<script type="text/javascript">
+    jQuery(document).ready(function () {
+        var $group_name = $('#group_name')
+        $group_name.blur(function (event) {
+            if ($(this).is('#group_name')) {
+                $.get(
+                        '<%=valid_ajax_course_path%>',
+                        { valid: "name",
+                            value: this.value },
+                        function (data) {
+                            if (!data.valid) {
+                                alert('<%= l(:label_groupname_repeat) %>');
+                            }
+                        });
+            }
+
+        });
+    });
+</script>
 <script type=" text/javascript" charset="utf-8">
     function validate_groupname(value1) {
 
diff --git a/app/views/layouts/course_base.html.erb b/app/views/layouts/course_base.html.erb
index af376b1f5..bad051fc5 100644
--- a/app/views/layouts/course_base.html.erb
+++ b/app/views/layouts/course_base.html.erb
@@ -1,5 +1,8 @@
-<% @nav_dispaly_project_label = 1
-   @nav_dispaly_forum_label = 1 %>
+<% @nav_dispaly_home_path_label = 1
+   @nav_dispaly_main_course_label = 1
+   @nav_dispaly_main_project_label = 1
+   @nav_dispaly_main_contest_label = 1 %>
+<% @nav_dispaly_forum_label = 1%>
 <!DOCTYPE html>
 <html lang="<%= current_language %>">
 <head>
diff --git a/app/views/projects/member.html.erb b/app/views/projects/member.html.erb
index 3d3076bcc..aca6f0b5a 100644
--- a/app/views/projects/member.html.erb
+++ b/app/views/projects/member.html.erb
@@ -1,4 +1,5 @@
-<div class="member_header">
+
+        <div class="member_header">
 	<p>
 		<%= @subPage_title %>
 	</p>
diff --git a/config/locales/zh.yml b/config/locales/zh.yml
index 38c5ae31f..993988153 100644
--- a/config/locales/zh.yml
+++ b/config/locales/zh.yml
@@ -576,8 +576,9 @@ zh:
   label_member_people: 人
   label_delete_group: 确定删除分班？
   label_current_group: 当前分班
-  label_limit_groupname: 组别名不能超出20字符
-  label_limit_groupname_null: 组别名不能为空
+  label_limit_groupname: 班名不能超出20字符
+  label_groupname_repeat: 该班名已存在
+  label_limit_groupname_null: 班名不能为空
   label_member_new: 添加成员
   label_member_plural: 成员
   label_tracker: 跟踪标签
diff --git a/config/routes.rb b/config/routes.rb
index d042a823e..e2f207870 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -651,6 +651,7 @@ RedmineApp::Application.routes.draw do
       match "addgroups",  :via => [:post, :get]
       match 'deletegroup', :via => [:delete]
       match 'show_member_score', :via => [:get]
+      match 'valid_ajax', :to => 'courses#valid_ajax', :via => :get
       post 'join_in/join_group', :to => 'courses#join_group', :as => 'join_group'
       delete 'join_in/join_group', :to => 'courses#unjoin_group'
     end
