<html xmlns="http://www.w3.org/1999/xhtml" xmlns:html="http://www.w3.org/1999/xhtml">
<head>
<bindings xmlns="http://www.mozilla.org/xbl">
<binding id="lub4">
<content>
<html:span style="color: green;">
<children/>
</html:span>
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</bindings>
</head>
<body onload="document.getElementById('gogo');">
<span style="-moz-binding: url('#lub4')"><div/><em id="gogo">I</em></span>
</body>
</html>