You can always use javasscript to detect such things. The following s a small script for OS detection by Bret Bailey. I got this from www.javascriptkit.com.

Insert this in the header section:


<SCRIPT LANGUAGE="JavaScript">

<!--
function checkOS() {
if(navigator.userAgent.indexOf('IRIX') != -1)
{ var OpSys = "Irix"; }
else if((navigator.userAgent.indexOf('Win') != -1) &&
(navigator.userAgent.indexOf('95') != -1))
{ var OpSys = "Windows95"; }
else if(navigator.userAgent.indexOf('Win') != -1)
{ var OpSys = "Windows3.1 or NT"; }
else if(navigator.userAgent.indexOf('Mac') != -1)
{ var OpSys = "Macintosh"; }
else { var OpSys = "other"; }
return OpSys;
}
// -->

</SCRIPT>


Insert this in the body section (Please dont remove the credits)


<script>
<!--
var OpSys = checkOS();
document.write(OpSys);
//-->
</script>

<p align="center"><font face="arial" size="-2">This free script provided by</font><br>
<font face="arial, helvetica" size="-2"><a href="http://javascriptkit.com">JavaScript
Kit</a></font></p>