diff --git a/django/contrib/admin/media/js/admin/DateTimeShortcuts.js b/django/contrib/admin/media/js/admin/DateTimeShortcuts.js
index ed99c6103d..35199baf84 100644
--- a/django/contrib/admin/media/js/admin/DateTimeShortcuts.js
+++ b/django/contrib/admin/media/js/admin/DateTimeShortcuts.js
@@ -217,7 +217,7 @@ var DateTimeShortcuts = {
        DateTimeShortcuts.dismissCalendar(num);
     },
     cancelEventPropagation: function(e) {
-        if (!e) var e = window.event;
+        if (!e) e = window.event;
         e.cancelBubble = true;
         if (e.stopPropagation) e.stopPropagation();
     }
diff --git a/django/contrib/admin/media/js/core.js b/django/contrib/admin/media/js/core.js
index 8eba69c9bb..d35bd29c1c 100644
--- a/django/contrib/admin/media/js/core.js
+++ b/django/contrib/admin/media/js/core.js
@@ -19,6 +19,7 @@ function removeEvent(obj, evType, fn) {
         return true;
     } else if (obj.detachEvent) {
         obj.detachEvent("on" + evType, fn);
+        return true;
     } else {
         return false;
     }