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<!DOCTYPE html> <html> <body> This document is displayed in IE<span id="demo"></span> mode <p><b>Note:</b> The documentMode property is only supported in Internet Explorer, from IE8+</p> <p><b>Note:</b> If no !DOCTYPE is specified, IE8 renders the page in IE5 mode!</p> <script> var x = document.documentMode; document.getElementById("demo").innerHTML = x; </script> </body> </html>