<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<bindings xmlns="http://www.mozilla.org/xbl" xmlns:html="http://www.w3.org/1999/xhtml">
<binding id="foo">
<content><html:span>ABC DEF<children xmlns="http://www.mozilla.org/xbl"/></html:span></content>
</binding>
</bindings>
<script type="text/javascript">
function boom()
{
var cap = document.getElementById("cap");
var space = document.createTextNode(" ");
cap.insertBefore(space, cap.firstChild);
}
</script>
</head>
<body onload="boom();">‭<caption id="cap" style="-moz-binding: url('#foo');"><span style="display: none;"/></caption></body>
</html>