function isMobile() {
    let mobileDeviceIndicator = 0;
    if (/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)) {
        mobileDeviceIndicator = 1;
    }
    /*
    let hasTouchscreen = 'ontouchstart' in window;
    alert(hasTouchscreen ? 'has touchscreen' : 'doesn\'t have touchscreen');
    */
}