The Tor Browser / file revision

 <?xml version="1.0"?> 

 <!-- This Source Code Form is subject to the terms of the Mozilla Public

    - License, v. 2.0. If a copy of the MPL was not distributed with this

    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->

 <?xml-stylesheet href="chrome://global/skin/" type="text/css"?> 

 <!DOCTYPE window> 

 <window orient="vertical" style="border: 2px solid green"

         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> 

   <script>

     function start()

 	{

 	   var row = document.getElementById("row");

 	   var text = document.createElement("text");

 	   text.setAttribute("value", "foo");

 	   row.appendChild(text);

 	}

   </script>

   <hbox>

     <grid style="border: 2px solid red;" id="grid">

 	   <columns>

 	   </columns>

 	   <rows>

 	     <row id="row">

 		   <button label="value"/>

 		 </row>

 	   </rows>

 	</grid>

 	<spacer flex="1" style="background-color: white"/>

   </hbox>

   <button label="insert" oncommand="start()"/>

 </window>