diff --git a/lib/sweet-alert.js b/lib/sweet-alert.js
index 5b5840e7..ba1efc2d 100755
--- a/lib/sweet-alert.js
+++ b/lib/sweet-alert.js
@@ -726,14 +726,14 @@
       sweetAlertInitialize();
     } else {
       if (document.addEventListener) {
-        document.addEventListener('DOMContentLoaded', function factorial() {
-          document.removeEventListener('DOMContentLoaded', arguments.callee, false);
+        document.addEventListener('DOMContentLoaded', function handler() {
+          document.removeEventListener('DOMContentLoaded', handler, false);
           sweetAlertInitialize();
         }, false);
       } else if (document.attachEvent) {
-        document.attachEvent('onreadystatechange', function() {
+        document.attachEvent('onreadystatechange', function handler() {
           if (document.readyState === 'complete') {
-            document.detachEvent('onreadystatechange', arguments.callee);
+            document.detachEvent('onreadystatechange', handler);
             sweetAlertInitialize();
           }
         });