<script><![CDATA[
		zk.afterLoad('zul.wnd', function() {
			var xWindow = {};
			zk.override(zul.wnd.Window.prototype, xWindow ,{
				onClose : function() {
					this.$n().querySelectorAll(".z-ckeditor").forEach(function(elem){
						zk.$(elem)._editor.destroy(true);
						delete zk.$(elem)._editor;
					});
					var result = xWindow.onClose.apply(this, arguments);
					return result;
				}
			});//zk.override
		});//zk.afterLoad
	]]></script>