User agent redirect

<script type="text/javascript">

    if (getMobileOperatingSystem() === "Android") {
        window.location.href = //link for android
    }

    if (getMobileOperatingSystem() === "iOS") {
        window.location.href = //link to ios
    }


    function getMobileOperatingSystem() {
        var userAgent = navigator.userAgent || navigator.vendor || window.opera;


        if (/windows phone/i.test(userAgent)) {
            return "Windows Phone";
        }

        if (/android/i.test(userAgent)) {
            return "Android";
        }

        if (/iPad|iPhone|iPod/.test(userAgent) && !window.MSStream) {
            return "iOS";
        }

        if (/BB10|playbook/i.test(userAgent)) {
            return "Black Berry"
        }

        if (/nokia/i.test(userAgent)) {
            return "Nokia";
        }
        return userAgent; //default ua
    }
    </script>