add comment

js/imgGallery.js

@@ -13,6 +13,9 @@ directionDetermined = false;
 touchDragStartX = null;
 touchDirection = null;
 
+// changes to style.rotate are necessary because transformed elements
+// get stuck in front of the gallery images
+
 function enlargeImage (filename) {
   viewState = photos.indexOf(filename);
   galleryImage.fullRes = filename;