Thanks guys. That helps alot! But this: <?php print $_SERVER['HTTP_USER_AGENT']; ?> Returned this using Mozilla: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7 And this using IE: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) Does that just mean that it's not completely accurate?