--- /dev/null
+/*!
+ * Ext JS Library 3.4.0
+ * Copyright(c) 2006-2011 Sencha Inc.
+ * licensing@sencha.com
+ * http://www.sencha.com/license
+ */
+
+ if (Ext.isIE) {
+ function fnCleanUp() {
+ var p = Function.prototype;
+ delete p.createSequence;
+ delete p.defer;
+ delete p.createDelegate;
+ delete p.createCallback;
+ delete p.createInterceptor;
+
+ window.detachEvent("onunload", fnCleanUp);
+ }
+ window.attachEvent("onunload", fnCleanUp);
+ }
+})();
\ No newline at end of file