detect mobile device

isMobile.js

// https://www.mattcromwell.com/detecting-mobile-devices-javascript/
var isMobile = { 
Android: function() { return navigator.userAgent.match(/Android/i); }, 
BlackBerry: function() { return navigator.userAgent.match(/BlackBerry/i); }, 
iOS: function() { return navigator.userAgent.match(/iPhone|iPad|iPod/i); }, 
Opera: function() { return navigator.userAgent.match(/Opera Mini/i); }, 
Windows: function() { return navigator.userAgent.match(/IEMobile/i); }, 
any: function() { return (isMobile.Android() || isMobile.BlackBerry() || isMobile.iOS() || isMobile.Opera() || isMobile.Windows()); } };