<!DOCTYPE html>
<html>
<head><title></title>
<script>
function getOS() {
// This script sets OSName variable as follows:
// "Windows" for all versions of Windows
// "MacOS" for all versions of Macintosh OS
// "Linux" for all versions of Linux
// "UNIX" for all other UNIX flavors
// "Unknown OS" indicates failure to detect the OS
var OSName = "Unknown OS";
if (navigator.appVersion.indexOf("Win") != -1) OSName = "Windows";
if (navigator.appVersion.indexOf("Mac") != -1) OSName = "MacOS";
if (navigator.appVersion.indexOf("X11") != -1) OSName = "UNIX";
if (navigator.appVersion.indexOf("Linux") != -1) OSName = "Linux";
alert("Your OS is " + OSName);
}
</script>
</head>
<body onload="getOS();">
</body>
</html>
