diff --git a/source/Ox.UI/js/Core/Message.js b/source/Ox.UI/js/Core/Message.js
index 5849cd83..24178e99 100644
--- a/source/Ox.UI/js/Core/Message.js
+++ b/source/Ox.UI/js/Core/Message.js
@@ -43,8 +43,8 @@ Ox.Message = (function() {
     @*/
     that.post = function(target, event, data) {
         target = target == Ox.$parent ? window.parent
-            : Ox.isElement(target[0]) ? target[0]
-            : $('#' + target)[0];
+            : Ox.isElement(target[0]) ? target[0].contentWindow
+            : $('#' + target)[0].contentWindow;
         target.postMessage(JSON.stringify({
             event: event,
             data: data,