diff --git a/lib/javascript-static.js b/lib/javascript-static.js
index 8c274cdcd9bdc..0fe020fcd2d82 100644
--- a/lib/javascript-static.js
+++ b/lib/javascript-static.js
@@ -333,11 +333,16 @@ M.util.init_maximised_embed = function(Y, id) {
         if (Y.Lang.isString(el)) {
             el = Y.one('#' + el);
         }
-        var val = el.getStyle(prop);
-        if (val == 'auto') {
-            val = el.getComputedStyle(prop);
+        // Ensure element exists.
+        if (el) {
+            var val = el.getStyle(prop);
+            if (val == 'auto') {
+                val = el.getComputedStyle(prop);
+            }
+            return parseInt(val);
+        } else {
+            return 0;
         }
-        return parseInt(val);
     };
 
     var resize_object = function() {