JavaScript 브라우저 체크 (OS 체크는 보너스)에서 가져옴.

function getOSInfoStr()
{
    var ua = navigator.userAgent;
 
    if(ua.indexOf("NT 6.0") != -1) return "Windows Vista/Server 2008";
    else if(ua.indexOf("NT 5.2") != -1) return "Windows Server 2003";
    else if(ua.indexOf("NT 5.1") != -1) return "Windows XP";
    else if(ua.indexOf("NT 5.0") != -1) return "Windows 2000";
    else if(ua.indexOf("NT") != -1) return "Windows NT";
    else if(ua.indexOf("9x 4.90") != -1) return "Windows Me";
    else if(ua.indexOf("98") != -1) return "Windows 98";
    else if(ua.indexOf("95") != -1) return "Windows 95";
    else if(ua.indexOf("Win16") != -1) return "Windows 3.x";
    else if(ua.indexOf("Windows") != -1) return "Windows";
    else if(ua.indexOf("Linux") != -1) return "Linux";
    else if(ua.indexOf("Macintosh") != -1) return "Macintosh";
    else return "";
}