1<?xml version="1.0"?> 2<?xml-stylesheet href="chrome://global/skin/global.css" type="text/css"?> 3<window orient="horizontal" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> 4 <vbox width="500"> 5 <scrollbar orient="horizontal"/> 6 </vbox> 7</window> 8