diff --git a/themes/bootstrap/js/embedGBS.js b/themes/bootstrap/js/embedGBS.js
index a6dfa1abfcd5c06b83a9e7efd9c569275e0023a3..ae81464ebeed323816e8dcb0e1ea3296bf22fbc7 100644
--- a/themes/bootstrap/js/embedGBS.js
+++ b/themes/bootstrap/js/embedGBS.js
@@ -1,3 +1,5 @@
+/*global getBibKeyString, google */
+
 // we don't need to wait for dom ready since lang is in the dom root
 var lang = document.documentElement.getAttribute('lang');
 google.load("books", "0", {"language":lang});
diff --git a/themes/bootstrap/js/preview.js b/themes/bootstrap/js/preview.js
index 6b7d9994f701299ad2daf7586558670f867b99ea..becd51e100bd3f1eac2bd4be2bccded55ff50cc6 100644
--- a/themes/bootstrap/js/preview.js
+++ b/themes/bootstrap/js/preview.js
@@ -5,7 +5,7 @@ function getHathiOptions() {
 function getGoogleOptions() {
     var opts_temp = $('[class*="googlePreviewSpan"]').attr("class").split('__')[1].split(';');
     var options = {};
-    for (key in opts_temp) {
+    for(var key in opts_temp) {
         var arr = opts_temp[key].split(':');
         options[arr[0]] = arr[1].split(',');
     }