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 collapseTag(id)

    {

      var row = window.document.getElementById(id);

 	 row.setAttribute("collapsed","true");

    }

    function uncollapseTag(id)

    {

      var row = window.document.getElementById(id);

 	 row.setAttribute("collapsed","false");

    }

 </script>

     <hbox>

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

 		   <columns id="columns1">

 		      <column id="column1"/>

 		      <column id="column2"/>

 		      <column id="column3"/>

 		   </columns>

 		   <rows id="rows1" style="font-size: 24pt">

 			 <row id="row1">

 			    <text value="cell1"/>

 			    <text value="cell2"/>

 			    <text value="cell3"/>

 			 </row>

  			 <row id="row2">

 			    <text value="cell4"/>

 			    <text value="cell5"/>

 			    <text value="cell6"/>

 			 </row>

 			 <row id="row3">

 			    <text value="cell7"/>

 			    <text value="cell8"/>

 			    <text value="cell9"/>

 			 </row>

 		   </rows>

 		</grid>

     </hbox>

 	<hbox>

 	  <button label="collapse row 2"   oncommand="collapseTag('row2');"/>

 	  <button label="uncollapse row 2" oncommand="uncollapseTag('row2');"/>

  	  <button label="collapse column 2"   oncommand="collapseTag('column2');"/>

 	  <button label="uncollapse column 2" oncommand="uncollapseTag('column2');"/>

 	</hbox>

 </window>