How to check if the web page is visited by a phone browser or a PC browser?

Question

How to check if a web page has been opened by a mobile browser or a computer browser. I tried this :

name = request.getHeader(\"User-Agent\");

Answer 1

this is a good link I just found:

http://www.abeautifulsite.net/blog/2011/11/detecting-mobile-devices-with-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());
    }
};