diff --git a/app/views/files/index.html.erb b/app/views/files/index.html.erb
index 489c0357d..eb2597127 100644
--- a/app/views/files/index.html.erb
+++ b/app/views/files/index.html.erb
@@ -223,6 +223,7 @@
                 });
 
     }
+    <%= if @course %>
     var tagNameHtml; //当前双击的链接的父节点的html
     var tagName;  //标签的值
     var parentCssBorder; //当前双击的链接的父节点
@@ -271,6 +272,7 @@
                }
            }
    });
+   <%end %>
 
 </script>