<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
    <title>test</title>
    <script type="text/javascript" charset="utf-8">

    function init() {
        var node = document.createElement('div');
        node.innerHTML = 'doh';
        node.childNodes.$family; // or any undefined value
    }

    </script>
</head>
<body onload="init()">

</body>
</html>