<!DOCTYPE HTML>
<html>
<head>
<script>
    try { o1 = document.createElement('button') } catch(e) { }
    try { o2 = document.createElement('p') } catch(e) { }
    try { o3 = o1.labels } catch(e) { }
    try { o4 = document.createNSResolver(document.documentElement) } catch(e) { }
    try { o5 = document.createRange(); } catch(e) { }
    try { document.documentElement.appendChild(o1) } catch(e) { }
    try { o5.selectNode(o4); } catch(e) { }
    try { o5.surroundContents(o2) } catch(e) { }
    try { o5.surroundContents(o2) } catch(e) { }
    try { o1.labels.length } catch(e) { }
</script>
</head>
</html>
