diff --git a/db/schema.rb b/db/schema.rb
index 2502a941b..bf9d24b3e 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -1125,23 +1125,6 @@ ActiveRecord::Schema.define(:version => 20160629094716) do
     t.integer  "viewed_count",  :default => 0
   end
 
-  create_table "mess", :id => false, :force => true do |t|
-    t.string   "课程名"
-    t.integer  "课程ID",                    :default => 0,  :null => false
-    t.string   "教师姓",                     :default => "", :null => false
-    t.string   "教师名",       :limit => 30, :default => "", :null => false
-    t.string   "主贴名",                     :default => "", :null => false
-    t.integer  "主贴或回帖ID",                 :default => 0,  :null => false
-    t.integer  "回帖对应主贴ID"
-    t.integer  "帖子点赞数"
-    t.integer  "主贴回复数",                   :default => 0,  :null => false
-    t.text     "主贴或回帖内容"
-    t.datetime "发帖时间",                                    :null => false
-    t.integer  "发帖或回帖用户ID",               :default => 0,  :null => false
-    t.string   "发帖或回帖用户姓",                :default => "", :null => false
-    t.string   "发帖或回帖用户名",  :limit => 30, :default => "", :null => false
-  end
-
   create_table "message_alls", :force => true do |t|
     t.integer  "user_id"
     t.integer  "message_id"
diff --git a/public/stylesheets/courses.css b/public/stylesheets/courses.css
index 9bfc00625..d6026537e 100644
--- a/public/stylesheets/courses.css
+++ b/public/stylesheets/courses.css
@@ -1270,7 +1270,7 @@ a:hover.blueCir{ background:#3598db; color:#fff;}
 .relatePImage {display:block; margin:0 auto;}
 
 /*上传资源弹窗*/
-.resourceUploadPopup {width:400px; height:auto; border:3px solid #269ac9 !important; padding-left:16px; padding-bottom:16px; background-color:#ffffff; position:absolute; top:50%; left:50%; margin-left:-200px; z-index:1000;}
+.resourceUploadPopup {width:400px; height:auto; border:3px solid #269ac9 !important; padding-left:16px; padding-bottom:16px; background-color:#ffffff; position:fixed; top:50%; left:50%; margin-left:-200px; z-index:1000;}
 .uploadDialogText {font-size:16px; color:#269ac9; line-height:16px; padding-top:20px; width:140px; display:inline-block; font-weight: bold;}
 .uploadBoxContainer {height:33px; line-height:33px; margin-top:10px; position:relative}
 .uploadBox {width:100px; height:33px; line-height:33px; text-align:center; vertical-align:middle; background-color:#269ac9; border-radius:3px; float:left; margin-right:12px;}
@@ -1428,4 +1428,4 @@ a.pages-big{ width:50px;}
 .W300 {width:300px !important;}
 .W600{ width:600px;}
 
-.syllabus_input {width: 290px; border: 1px solid #64bdd9; height: 30px;}
\ No newline at end of file
+.syllabus_input {width: 290px; border: 1px solid #64bdd9; height: 30px;}