<?xml version="1.0"?>

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

<window id="example-window" title="Example 6.2.3"
        xmlns:html="http://www.w3.org/1999/xhtml"
        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<button label="Types" type="menu">
  <menupopup onpopupshowing="event.preventDefault();">
    <menuitem label="Glass"/>
    <menuitem label="Plastic"/>
  </menupopup>
</button>


</window>

