'document' in this && "cloneNode" in document.documentElement

@@ -54,9 +54,156 @@
 tElement
+ && (function() %7B%0A%09var test = document.createElement('input');%0A%09test.checked = true;%0A%09var result = test.cloneNode();%0A%09return !!result.checked;%0A%7D)()
 %0A

Improve detect to cover the incomplete implementation in IE8