diff --git a/app/controllers/tags_controller.rb b/app/controllers/tags_controller.rb
index c08f8a3e6..cb61177f5 100644
--- a/app/controllers/tags_controller.rb
+++ b/app/controllers/tags_controller.rb
@@ -246,12 +246,14 @@ class TagsController < ApplicationController
     if  @taggable_id.blank? #如果没有传tag_id，那么直接更新tag_name就好了。但是要防止 重命名后的tag存在。
       if @course_id
         course = Course.find @course_id
-        course.attachments.each do |attachment|
-          taggings = ActsAsTaggableOn::Tagging.find_by_tag_id_and_taggable_id_and_taggable_type(@tag_id,attachment.id,attachment.class)
-          if taggings
-            taggings.delete
-            attachment.tag_list.add(@rename_tag_name.split(","))
-            attachment.save
+        if course
+          course.attachments.each do |attachment|
+            taggings = ActsAsTaggableOn::Tagging.find_by_tag_id_and_taggable_id_and_taggable_type(@tag_id,attachment.id,attachment.class)
+            if taggings
+              taggings.delete
+              attachment.tag_list.add(@rename_tag_name.split(","))
+              attachment.save
+            end
           end
         end
       end
diff --git a/app/views/files/index.html.erb b/app/views/files/index.html.erb
index 6b1fdb2e9..656baaf63 100644
--- a/app/views/files/index.html.erb
+++ b/app/views/files/index.html.erb
@@ -246,36 +246,63 @@
         tagId = id;
         taggableType = type;
         width = parseInt(domEle.css('width').replace('px','')) >=100 ?  parseInt(domEle.css('width').replace('px','')) : 100
-        domEle.html('<input name="" id="renameTagName" maxlength="<%=Setting.tags_max_length%>" minlength="<%= Setting.tags_min_length%>" style="width:'+width +'px;" value="'+name+'"/>');
+        domEle.html('<input name=""  id="renameTagName" maxlength="<%=Setting.tags_max_length%>" minlength="<%= Setting.tags_min_length%>" style="width:'+width +'px;" value="'+name+'"/>');
         domEle.parent().css("border","1px solid #ffffff");
         $("#renameTagName").focus();
     }
   //监听所有的单击事件
-   $(document.body).click(function(e){
-       isdb = false; //这是单击
-       node = document.elementFromPoint(e.clientX, e.clientY);
-       if(node.tagName == "INPUT"){ //如果是输入框的聚焦，那么就不要进行下去了
-           isdb = true; //为了防止在编辑的时候又去单击其他tag去过滤。导致tag过滤不可用
-           return;
-       }
-           if($("#renameTagName")[0] != undefined ){//存在renameTagName,则处于编辑状态
-               if($("#renameTagName").val().trim() == tagName){ //如果值一样，则恢复原来的状态
-                   ele.parent().css("border","");
-                   ele.parent().html(tagNameHtml);
+    $(function(){
+        $("#renameTagName").live("blur",function(){
+            updateTagName();
+        }).live("keypress",function(e){
+            if (e.keyCode == '13') {
+                updateTagName();
+            }
+        });
+    });
 
-               }else{ //否则就要更新tag名称了
-//                    if(confirm("是否将标签改为 "+ $("#renameTagName").val().trim())){  去掉询问
-                          $.post(
-                                    '<%= update_tag_name_path %>',
-                                    {"taggableId": tagId, "taggableType": taggableType, "tagName": tagName, "renameName": $("#renameTagName").val().trim(),"courseId":<%= @course.id%>}
-                          )
-//                   }else{
-//                       ele.parent().css("border","");
-//                       ele.parent().html(tagNameHtml);
-//                   }
-               }
-           }
-   });
+    //执行修改TAGName方法
+    function updateTagName(){
+        if(isdb){
+            isdb = false;
+            if($("#renameTagName").val() == tagName){ //如果值一样，则恢复原来的状态
+                ele.parent().css("border","");
+                ele.parent().html(tagNameHtml);
+
+            }
+            else{
+                $.post(
+                        '<%= update_tag_name_path %>',
+                        {"taggableId": tagId, "taggableType": taggableType, "tagName": tagName, "renameName": $("#renameTagName").val().trim(),"courseId":<%= @course.id%>}
+                );
+            }
+        }
+    }
+//   $(document.body).click(function(e){
+//       isdb = false; //这是单击
+//       node = document.elementFromPoint(e.clientX, e.clientY);
+//       if(node.tagName == "INPUT"){ //如果是输入框的聚焦，那么就不要进行下去了
+//           isdb = true; //为了防止在编辑的时候又去单击其他tag去过滤。导致tag过滤不可用
+//           return;
+//       }
+//           if($("#renameTagName")[0] != undefined ){//存在renameTagName,则处于编辑状态
+//               if($("#renameTagName").val().trim() == tagName){ //如果值一样，则恢复原来的状态
+//                   ele.parent().css("border","");
+//                   ele.parent().html(tagNameHtml);
+//
+//               }else{ //否则就要更新tag名称了
+////                    if(confirm("是否将标签改为 "+ $("#renameTagName").val().trim())){  去掉询问
+//                          $.post(
+//                                    '<%= update_tag_name_path %>',
+//                                    {"taggableId": tagId, "taggableType": taggableType, "tagName": tagName, "renameName": $("#renameTagName").val().trim(),"courseId":<%= @course.id%>}
+//                          )
+////                   }else{
+////                       ele.parent().css("border","");
+////                       ele.parent().html(tagNameHtml);
+////                   }
+//               }
+//           }
+//   });
    <%end %>
 
 </script>