diff --git a/src/js/slate.js b/src/js/slate.js
index a9f8d60..b76aaa3 100644
--- a/src/js/slate.js
+++ b/src/js/slate.js
@@ -264,8 +264,8 @@ renderTiles();
 var getBackgroundImages = function() {
     var backgrounds = document.getElementsByTagName("body");
     var images = [];
-    if (backgrounds.length > 0) {
-        var imgString = backgrounds[0].getAttribute("data-backgrounds");
+    var imgString = backgrounds[0].getAttribute("data-backgrounds");
+    if (imgString) {
         images = imgString.split(/[\s,]+/).filter(Boolean);
     }
     return images;
diff --git a/static/js/slate.js b/static/js/slate.js
index b546c22..a48cc6a 100644
--- a/static/js/slate.js
+++ b/static/js/slate.js
@@ -3465,8 +3465,8 @@ renderTiles();
 var getBackgroundImages = function() {
     var backgrounds = document.getElementsByTagName("body");
     var images = [];
-    if (backgrounds.length > 0) {
-        var imgString = backgrounds[0].getAttribute("data-backgrounds");
+    var imgString = backgrounds[0].getAttribute("data-backgrounds");
+    if (imgString) {
         images = imgString.split(/[\s,]+/).filter(Boolean);
     }
     return images;