Dirottare a sito mobile con Javascript

[carlomarx]

var bIsMobile = /Android|webOS|iPhone|iPad|iPod|BlackBerry|Windows Phone/i.test(navigator.userAgent);
var rNoMobile = /(https?\:\/\/)www\./i;
var sMobile = "mobile.";

if (bIsMobile && rNoMobile.test(location.href)) {
    location.replace(location.href.replace(rNoMobile, "$1" + sMobile));
};