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Test Info:

<html>
<head>
<style>
:nth-last-child(2) { -moz-appearance:listbox }
</style>
<script>
try { o1 = document.createElement('tr') } catch(e) { }
try { o2 = document.createElement('th') } catch(e) { }
try { o3 = document.createElement('canvas') } catch(e) { }
try { document.documentElement.appendChild(o1) } catch(e) { }
try { o1.appendChild(o2) } catch(e) { }
try { o1.appendChild(o3) } catch(e) { }
</script>
</head>
</html>