Use Javascript navigator.useragent to detect mobile devices

There are many ways to detect a device. Today, i suggest  a method of using JavaScript to detect a device

Navigator.useragent allows you to detect mobile devices including ipad

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());
    }};
}

and use it as the following:

 if( isMobile.iOS() ) alert('iOS');

or simply including all in a function

function detectmob() {
     return !!navigator.userAgent.match(/iPad|iPhone|Android|BlackBerry|Windows Phone|webOS/i));
}