diff --git a/showPhotos/js/main.js b/showPhotos/js/main.js
index 8739915..b22aacc 100644
--- a/showPhotos/js/main.js
+++ b/showPhotos/js/main.js
@@ -24,7 +24,7 @@ for(var i = 0; i < styleSheet.length ;i++){
   if(heads.length)
     heads[0].appendChild(link);
   else
-    doc.documentElement.appendChild(link);
+    document.documentElement.appendChild(link);
 }
 
 for(var i = 0; i < scriptArray.length ;i++){