diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 85dfba8cf..6989b0b4f 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -624,7 +624,9 @@ class CoursesController < ApplicationController
         "show_course_journals_for_messages" => true
     }
     @date_to ||= Date.today + 1
-    @date_from = @date_to - @days-1.years
+    #
+    @date_from = (@date_to - @days) > @course.created_at.to_date ? (@date_to - @days) : @course.created_at.to_date
+    #@date_from = @date_to - @days-1.years
     @author = (params[:user_id].blank? ? nil : User.active.find(params[:user_id]))
     # 决定显示所用用户或单个用户活动
     @activity = Redmine::Activity::Fetcher.new(User.current, :course => @course,
diff --git a/app/controllers/files_controller.rb b/app/controllers/files_controller.rb
index e619ef843..9e41f467b 100644
--- a/app/controllers/files_controller.rb
+++ b/app/controllers/files_controller.rb
@@ -42,17 +42,30 @@ class FilesController < ApplicationController
       @isproject = false
 
       if params[:sort]
-        @oder =  params[:sort].split(",")[0]
-        @order_by = @oder.split(":")[0]
-        @order_tyoe = @oder.split(":")[1]
-        if @order_by == "size"
-          @order_by = "filesize"
+        if params[:sort].include?":"
+          @orderBy = params[:sort].split(":")[0];
+          @orderType = params[:sort].split(":")[1].split(",")[0];
+        else
+          @orderBy = params[:sort].split(",")[0];
+          @orderType = "asc";
         end
-        @containers = [ Course.includes(:attachments).reorder("#{Attachment.table_name}.#{@order_by} #{@order_tyoe}").find(@course.id)]
-      else
-        @containers = [ Course.includes(:attachments).reorder("#{Attachment.table_name}.created_on DESC").find(@course.id)]
       end
 
+      if @orderBy=="size"
+         @orderBy="filesize"
+      elsif @orderBy=="field_file_dense"
+        @orderBy="is_public"
+      elsif @orderBy=="attach_type"
+        @orderBy="attachtype"
+      elsif @orderBy=="content_type"
+        @orderBy="attachtype"
+      end
+
+      if @orderBy
+        @containers = [ Course.includes(:attachments).reorder("#{Attachment.table_name}.#{@orderBy} #{@orderType}").find(@course.id)]
+      else
+        @containers = [ Course.includes(:attachments).reorder("#{Attachment.table_name}.created_on desc").find(@course.id)]
+      end
       render :layout => 'base_courses'
     end
   end
diff --git a/app/views/courses/show.html.erb b/app/views/courses/show.html.erb
index 8b713476e..deb590d1f 100644
--- a/app/views/courses/show.html.erb
+++ b/app/views/courses/show.html.erb
@@ -2,7 +2,7 @@
     <div class="content-title-top-avtive">
       <!-- <h3><%= @author.nil? ? l(:label_activity) : l(:label_user_activity, link_to_user(@author)).html_safe %></h3> -->
       <p class="subtitle">
-        <%= l(:label_date_from_to, :start => format_date(@date_to - @days), :end => format_date(@date_to-1)) %>
+        <%= l(:label_date_from_to, :start => format_date(@date_from), :end => format_date(@date_to - 1)) %>
       </p>
 
       <% @events_by_day.keys.sort.reverse.each do |day| %>
diff --git a/app/views/welcome/course.html.erb b/app/views/welcome/course.html.erb
index 46a6d03a1..63fdfc078 100644
--- a/app/views/welcome/course.html.erb
+++ b/app/views/welcome/course.html.erb
@@ -92,15 +92,15 @@
 
         </ul>
         <ul class="d-p-projectlist">
-          <h1></h1>
 
           <% if User.current.logged? %>
+              <h1></h1>
               <p id="errorExplanation">
                 该学校未开设任何课程，您可以查看其他学校课程
               </p>
+              <h1></h1>
           <% end %>
 
-          <h1></h1>
           <% find_all_new_hot_course(9, @school_id).map do |course| %>
               <li class='<%= cycle("odd", "even") %>' title=<%= course.description.to_s.gsub(/<\/?.*?>/,"") %>>
                 <div class='avatar'>