diff --git a/app/controllers/attachments_controller.rb b/app/controllers/attachments_controller.rb
index 976772b80..589398c07 100644
--- a/app/controllers/attachments_controller.rb
+++ b/app/controllers/attachments_controller.rb
@@ -16,7 +16,7 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 class AttachmentsController < ApplicationController
-  before_filter :find_project, :except => :upload
+  before_filter :find_project, :only => [:show, :download, :thumbnail, :destroy, :delete_homework]#, :except => [:upload, :autocomplete]
   before_filter :file_readable, :read_authorize, :only => [:show, :thumbnail]#Modified by young
   before_filter :delete_authorize, :only => :destroy
   before_filter :authorize_global, :only => :upload
@@ -131,6 +131,41 @@ class AttachmentsController < ApplicationController
     end
   end
 
+  def autocomplete
+    @project = Project.find_by_id(params[:project_id])
+    respond_to do |format|
+      format.js
+    end
+  end
+
+  def add_exist_file_to_project
+    classname = params[:class_name]
+    class_id  = params[:class_id]
+    attachments = params[:attachment][:attach]
+
+    obj = Object.const_get(classname).find_by_id(class_id)
+    attachments.collect do |attach_id|
+      ori = Attachment.find_by_id(attach_id)
+      next if ori.blank?
+      attach_copied_obj = ori.copy
+      attach_copied_obj.container = obj
+      attach_copied_obj.created_on = Time.now
+      @obj = obj
+      @save_flag = attach_copied_obj.save
+      @save_message = attach_copied_obj.errors.full_messages
+    end
+
+    respond_to do |format|
+      format.js 
+    end
+  rescue NoMethodError
+    @save_flag = false
+    @save_message = [] << l(:error_attachment_empty)
+    respond_to do |format|
+      format.js 
+    end
+  end
+
 private
   def find_project
     @attachment = Attachment.find(params[:id])
diff --git a/app/helpers/attachments_helper.rb b/app/helpers/attachments_helper.rb
index a90807718..a3080fbfd 100644
--- a/app/helpers/attachments_helper.rb
+++ b/app/helpers/attachments_helper.rb
@@ -85,4 +85,82 @@ module AttachmentsHelper
     Attachment.tagged_with(tag_name).order('created_on desc')
   end
 
+  def render_attachments_for_new_project(project, limit=nil)
+    # 查询条件
+    params[:q] ||= "" 
+    filename_condition = params[:q]
+
+    attachAll = Attachment.scoped
+    # 当前项目所有资源
+    # attachments = Attachment.find_all_by_container_type_and_container_id(project.class, project.id)
+    # attachments = Attachment.where("container_type = '#{project.class}' and container_id = #{project.id}")
+
+    # 除去当前项目的所有资源
+    nobelong_attach = Attachment.where("container_type <> '#{project.class}' and container_id <> #{project.id}") unless project.blank?
+
+    # 搜索域确定
+    domain = project.nil? ? attachAll : nobelong_attach
+
+    # 搜索到的资源
+    searched_attach = domain.where("filename like '%#{filename_condition}%' ").limit(limit).order('created_on desc')
+    searched_attach = private_filter searched_attach
+    searched_attach = paginateHelper(searched_attach, 10)
+
+    s = content_tag('div', attachments_check_box_tags('attachment[attach][]', searched_attach), :id => 'attachments')
+    links = pagination_links_full(@obj_pages, @obj_count, :per_page_links => false) {|text, parameters, options|
+      link_to text, attachments_autocomplete_path( parameters.merge(:q => params[:q], :format => 'js')), :remote => true }
+
+    return s + content_tag('div', content_tag('ul', links), :class => 'pagination')
+
+    # ================================================================================================
+
+    # attach_count = searched_attach.count
+    # attach_pages = Redmine::Pagination::Paginator.new attach_count, 10, params['page'] #by young
+    # attachs = searched_attach.offset(attach_pages.offset).limit(attach_pages.per_page).all
+
+    # s = content_tag('div', attachments_check_box_tags('attachment[attach][]', attachs), :id => 'attachments')
+    # links = pagination_links_full(attach_pages, attach_count, :per_page_links => false) {|text, parameters, options|
+    #   link_to text, attachments_autocomplete_path( parameters.merge(:q => params[:q], :format => 'js')), :remote => true }
+
+    # return s + content_tag('div', content_tag('ul', links), :class => 'pagination')
+    # return searched_attach.to_json
+  end
+
+  def attachments_check_box_tags(name, attachs)
+    s = ''
+    attachs.each do |attach|
+      s << "<label>#{ check_box_tag name, attach.id, false, :id => nil } #{h attach.filename}</label><br/>"
+    end
+    s.html_safe
+  end
+
+  def private_filter resultSet
+    result = resultSet.to_a.dup
+
+    resultSet.map { |res|
+      if(res.container.nil? || 
+        (res.container.class.to_s=="Project" && res.container.is_public == false) ||
+        (res.container.has_attribute?(:project) && res.container.project.is_public == false) ||
+        (res.container.class.to_s=="HomeworkAttach" && res.container.bid.reward_type == 3) ||
+        false
+        )
+        result.delete(res)
+      end
+    }
+    result
+  end
+  include Redmine::Pagination
+  def paginateHelper obj, pre_size=10
+    @obj_count = obj.count
+    @obj_pages = Paginator.new @obj_count, pre_size, params['page']
+    if obj.kind_of? ActiveRecord::Base or obj.kind_of?  ActiveRecord::Relation
+      obj.limit(@obj_pages.per_page).offset(@obj_pages.offset)
+    elsif obj.kind_of? Array
+      obj[@obj_pages.offset, @obj_pages.per_page]
+    else
+      logger.error "[ApplicationController] Error : application_controller#paginateHelper ===> unknow category: #{obj.class}"
+      raise RuntimeError, 'unknow type, Please input you type into this helper.'
+    end
+  end
+
 end
diff --git a/app/models/attachment.rb b/app/models/attachment.rb
index e669428f6..768be578f 100644
--- a/app/models/attachment.rb
+++ b/app/models/attachment.rb
@@ -169,7 +169,7 @@ class Attachment < ActiveRecord::Base
 
   def deletable?(user=User.current)
     if container_id
-      container && container.attachments_deletable?(user)
+      container && (container.is_a?(Project) ? container.attachments_deletable?(user) : true )
     else
       author == user
     end
diff --git a/app/views/attachments/_links.html.erb b/app/views/attachments/_links.html.erb
index 81eb416af..c135ee214 100644
--- a/app/views/attachments/_links.html.erb
+++ b/app/views/attachments/_links.html.erb
@@ -9,14 +9,14 @@
   <%= h(" - #{attachment.description}") unless attachment.description.blank? %>
   <span class="size">(<%= number_to_human_size attachment.filesize %>)</span>
   <% if options[:deletable] %>
-  	<% unless attachment.container_type == 'HomeworkAttach' %>
-    <%= link_to image_tag('delete.png'), attachment_path(attachment),
+  	<% if attachment.container_type == 'HomeworkAttach' %>
+    <%= link_to image_tag('delete.png'), {:controller => 'attachments', :action => 'delete_homework', :id => attachment.id},
                                          :data => {:confirm => l(:text_are_you_sure)},
                                          :method => :delete,
                                          :class => 'delete',
                                          :title => l(:button_delete) %>
     <% else %>                                  
-  	<%= link_to image_tag('delete.png'), {:controller => 'attachments', :action => 'delete_homework', :id => attachment.id},
+    <%= link_to image_tag('delete.png'), attachment_path(attachment),
                                          :data => {:confirm => l(:text_are_you_sure)},
                                          :method => :delete,
                                          :class => 'delete',
diff --git a/app/views/attachments/add_exist_file_to_project.js.erb b/app/views/attachments/add_exist_file_to_project.js.erb
new file mode 100644
index 000000000..58e5690ef
--- /dev/null
+++ b/app/views/attachments/add_exist_file_to_project.js.erb
@@ -0,0 +1,17 @@
+<% if @save_flag %>
+	window.location.reload();
+<% else %>
+	// alert('添加文件失败:\n<%=@save_message[0]%>');
+	$('#ajax-modal').html('<h3 class="title">添加文件失败</h3><%=@save_message.join(', ')%>');
+
+	var el = $('#ajax-modal').first();
+	var title = el.find('h3.title').text();
+	el.dialog({
+		width: '200px',
+		modal: true,
+		resizable: false,
+		dialogClass: 'modal',
+		title: title
+	});
+	
+<% end %>
diff --git a/app/views/attachments/autocomplete.js.erb b/app/views/attachments/autocomplete.js.erb
new file mode 100644
index 000000000..784128ea1
--- /dev/null
+++ b/app/views/attachments/autocomplete.js.erb
@@ -0,0 +1,2 @@
+$('#relation_file_form').show();
+$('#relation_file').html('<%=render_attachments_for_new_project(@project, nil)%>');
diff --git a/app/views/files/index.html.erb b/app/views/files/index.html.erb
index 2b1853094..508aa502b 100644
--- a/app/views/files/index.html.erb
+++ b/app/views/files/index.html.erb
@@ -81,25 +81,77 @@ div.tags_area {
 	white-space: nowrap; 
 	text-overflow: ellipsis;
 }
+div.pagination{
+  margin: 10px 0px;
+  height: 1.5em;
+  text-align: left;
+  font-size: 13px;
+}
+.m5p5{
+  display: inline-block;
+  height: auto;
+  color: white !important; 
+  margin: 8px;
+  padding: 3px 7px;
+}
+.m5p5:hover {
+  text-decoration: none;
+  /*padding-bottom: 3px;*/
+  /*border-bottom: 1px solid #666666;*/
+  border-radius: 4px;
+  border: 1px solid #15bccf;
+  box-shadow: 3px 3px 3px #666666;
+}
+#relation_file_div{
+  margin: 0px 25px;
+}
+#relation_file_div fieldset{
+  margin: 0px 25px;
+  border-radius: 5px;
+}
 </style>
 
  
 <span class="borad-title"><%=(@project.project_type == 1) ? t(:label_user_course) : t(:label_project) %>文件共享专区</span>
 
 <div class="content-title-top">
-<%= link_to(l(:label_attachment_new), new_project_file_path(@project), :class => 'icon icon-add') if User.current.allowed_to?(:manage_files, @project) %>
+  <%= link_to(l(:label_attachment_new), 'javascript:void(0);', :onclick=>"$('#file_buttons').slideToggle();", :class => 'icon icon-add') if User.current.allowed_to?(:manage_files, @project) %>
+  <div class="clearfix"></div>
+  <div id="file_buttons" class="hidden">
+    <%= link_to('上传文件', new_project_file_path(@project), :class => 'icon m5p5 button_submit') if User.current.allowed_to?(:manage_files, @project) %>
+    <%= link_to('关联已有文件', 'javascript:void(0);', :onclick => "$('#relation_file_div').slideToggle();", :class => 'icon m5p5 button_submit') if User.current.allowed_to?(:manage_files, @project) %>
 
-<% if Rails.env.development? %>
-<a href="#" class = 'icon' onclick="modalWin();">~测试测试~</a>
-<script type="text/javascript">
-  function modalWin () {
-    $('#ajax-modal').html('<h3 class="title">~测试测试~</h3><p>导入勾选文件xxx test</p>');
-    showModal('ajax-modal', '400px');
+    <div id="relation_file_div" class="hidden" >
+      <fieldset>
+        <legend>搜索</legend>
+      <%= form_tag(
+          attachments_autocomplete_path(:format => 'js'), 
+          :remote => true,
+          :method => :post) do %>
+        <%= label_tag(:attach_search, "按文件名搜索:") %>
+        <%= text_field_tag(:attach_search) %>
+        <%#= submit_tag("Search") %>
+      <% end -%>
+      <%= form_tag attach_relation_path(:format => 'js'), 
+          method: :post, 
+          remote: true, 
+          id:"relation_file_form",
+          :class => 'hidden' do %>
+        <%= hidden_field_tag(:class_name, 'Project') %>
+        <%= hidden_field_tag(:class_id, params[:project_id]) %>
+        <div id="relation_file" >
+        </div>
+        <div class="kclearfix" style='margin-top: 10px;' >
+          <%= submit_tag(l(:button_add)) -%>
+        </div>
+      <% end -%>  
+      </fieldset>
+  </div>
+  </div>
 
-  } 
-</script>
-<% end %>
 </div>  
+<%= javascript_tag "observeSearchfield('attach_search', null, '#{ escape_javascript attachments_autocomplete_path(:project_id => @project.id, :format => 'js') }')" %>
+
 
 <% delete_allowed = User.current.allowed_to?(:manage_files, @project) %>
 <table class="list files" id="ver-zebra" >
@@ -130,7 +182,7 @@ div.tags_area {
     <% end -%>
     <% container.attachments.each do |file| %>
     <tr class="file <%= cycle("odd", "odd") %>">
-      <td class="filename" style="font-size: 13px; width: 240px; "><%= link_to_attachment file, :download => true, :title => file.filename+"\n"+file.description, :style => "width: 230px; overflow: hidden; white-space: nowrap;text-overflow: ellipsis;" %></td>
+      <td class="filename" style="font-size: 13px; width: 240px; "><%= link_to_attachment file, :download => true, :title => file.filename+"\n"+file.description.to_s, :style => "width: 230px; overflow: hidden; white-space: nowrap;text-overflow: ellipsis;" %></td>
       <td class="created_on"><%= format_time(file.created_on) %></td>
       <td class="filesize"><%= number_to_human_size(file.filesize) %></td>
       <td class="downloads"><%= file.downloads %></td>
diff --git a/app/views/tags/_tag.html.erb b/app/views/tags/_tag.html.erb
index b2cd77054..7eb360d53 100644
--- a/app/views/tags/_tag.html.erb
+++ b/app/views/tags/_tag.html.erb
@@ -31,7 +31,7 @@
 		</div>
 
 	<% elsif object_flag == '6' %>
-		<span><%= image_tag("/images/sidebar/tags.png") %></span>
+		<span><%#= image_tag("/images/sidebar/tags.png") %></span>
 		<span>
 			<%= link_to (image_tag "/images/sidebar/add.png"), 'javascript:void(0);', :class => "tags_icona", :onclick=>"$('#put-tag-form-#{obj.class}-#{obj.id}').toggle(); readmore(this);" if User.current.logged? %>
 			<%#= toggle_link (image_tag "/images/sidebar/add.png"), "put-tag-form-#{obj.class}-#{obj.id}", {:focus => "put-tag-form-#{obj.class}-#{obj.id} #name"} if User.current.logged? %>
diff --git a/config/locales/zh.yml b/config/locales/zh.yml
index 0c1797553..5d7f440ff 100644
--- a/config/locales/zh.yml
+++ b/config/locales/zh.yml
@@ -1150,6 +1150,7 @@ zh:
   button_export: 导出
   label_export_options: "%{export_format} 导出选项"
   error_attachment_too_big: 该文件无法上传。超过文件大小限制 (%{max_size})
+  error_attachment_empty: 文件不能为空
   notice_failed_to_save_time_entries: "无法保存下列所选取的 %{total} 个项目中的 %{count} 工时： %{ids}。"
   label_x_issues:
     zero:  0 问题
diff --git a/config/routes.rb b/config/routes.rb
index 882544a55..7633a9c9f 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -385,6 +385,9 @@ RedmineApp::Application.routes.draw do
   get 'attachments/download/:id/:filename', :to => 'attachments#download', :id => /\d+/, :filename => /.*/, :as => 'download_named_attachment'
   get 'attachments/download/:id', :to => 'attachments#download', :id => /\d+/
   get 'attachments/thumbnail/:id(/:size)', :to => 'attachments#thumbnail', :id => /\d+/, :size => /\d+/, :as => 'thumbnail'
+  get 'attachments/autocomplete'
+  match 'attachments/autocomplete', :to => 'attachments#autocomplete', via: [:post]
+  post 'attachments/relationfile', to: 'attachments#add_exist_file_to_project', as: 'attach_relation'
   resources :attachments, :only => [:show, :destroy]
 
   resources :groups do
diff --git a/public/themes/redpenny-master/stylesheets/application.css b/public/themes/redpenny-master/stylesheets/application.css
index f55078750..c68e36cd7 100644
--- a/public/themes/redpenny-master/stylesheets/application.css
+++ b/public/themes/redpenny-master/stylesheets/application.css
@@ -1898,7 +1898,7 @@ input[type="submit"], .button_submit {
     font-family: '微软雅黑',Arial,Helvetica,sans-serif;
     font-size: 12px;
     color: #fff;
-    padding: 0px;
+    padding: 3px 9px;
     background: #15bccf; 
     border-radius: 4px;
     border: 1px solid #15bccf;
diff --git a/test/fixtures/attachments.yml b/test/fixtures/attachments.yml
index 6384c8ee6..33bd60159 100644
--- a/test/fixtures/attachments.yml
+++ b/test/fixtures/attachments.yml
@@ -267,3 +267,31 @@ attachments_020:
   filename: root_attachment.txt
   filesize: 54
   author_id: 2
+attachments_021: 
+  content_type: text/plain
+  downloads: 0
+  created_on: 2012-05-12 16:14:50 +09:00
+  disk_filename: 120512161450_project_test.txt
+  disk_directory:
+  container_id: 2
+  digest: b0fe2abdb2599743d554a61d7da7ff74
+  id: 21
+  container_type: Project
+  description: ""
+  filename: project_test.txt
+  filesize: 54
+  author_id: 2
+attachments_022: 
+  content_type: text/plain
+  downloads: 0
+  created_on: 2012-05-12 16:14:50 +09:00
+  disk_filename: 120512161450_course_test.txt
+  disk_directory:
+  container_id: 1
+  digest: b0fe2abdb2599743d554a61d7da7ff74
+  id: 22
+  container_type: Project
+  description: ""
+  filename: course_test.txt
+  filesize: 54
+  author_id: 2
\ No newline at end of file
diff --git a/test/unit/attachment_test.rb b/test/unit/attachment_test.rb
new file mode 100644
index 000000000..bd3f4659a
--- /dev/null
+++ b/test/unit/attachment_test.rb
@@ -0,0 +1,20 @@
+# encoding: utf-8
+require 'test_helper'
+
+class AttachmentsTest < ActiveSupport::TestCase
+  include AttachmentsHelper
+
+  def setup
+    @file_belong_to = attachments(:attachments_021)
+    @file_not_belong_to = attachments(:attachments_022)
+    @project = @file_belong_to.container
+  end
+
+  test "can be find file not belong to project" do
+    params = {:q => @file_not_belong_to}
+    found_file = render_attachments_for_new_project(@project)
+    assert found_file.include?(@file_not_belong_to)
+    assert_not found_file.include?(@file_belong_to)
+  end
+
+end