The Tor Browser / file revision

 <?xml version="1.0"?>

 <window id="Test for bug 540247" title="Testcase" class="reftest-wait"

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

 <script><![CDATA[

 document.addEventListener("MozReftestInvalidate", runtest, false);

 function runtest() {

   document.getElementById('b').height = '100';

   var sbo = document.getElementById('s').boxObject.

               QueryInterface(Components.interfaces.nsIScrollBoxObject);

   sbo.scrollTo(0, 1000);

   document.documentElement.className = "";

 }

 ]]>

 </script>

   <scrollbox id="s" height="200" style="overflow: scroll;">

     <vbox>

       <vbox height="150" width="200" style="background: red;" id="b"/>

       <vbox height="150" width="200" style="background: green;"/>

       <vbox height="150" width="200" style="background: blue;"/>

       <label value="a"/>

     </vbox>

   </scrollbox>

 </window>