diff --git a/www/oocell/doc.js b/www/oocell/doc.js
index 96276c9ba..fd9dca9ea 100644
--- a/www/oocell/doc.js
+++ b/www/oocell/doc.js
@@ -30,7 +30,10 @@ config = {
         "onAppReady": function(evt) { console.log("in onAppReady"); },
     }
 };
-window.onbeforeunload = null;
+window.onbeforeunload = function () {
+    var ifr = document.getElementsByTagName('iframe')[0];
+    if (ifr) { ifr.remove(); }
+};
 
 
 var docEditor = new DocsAPI.DocEditor("placeholder", config);