mobile detection

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=2.0">
<title>mobile</title>
</head>
<body>
<script>
    var ua = navigator.userAgent;
    document.write(ua);
    var ismobile = ua.match(/Mobile/i);
    if( ismobile == "Mobile") {
        document.write("<h1>모바일입니다.</h1>");
    } else {
        document.write("<h1>모바일이 아닙니다.</h1>");
    }
</script>
</body>
</html>