Test for mobile user agent, boolean
function isMobile(){
return (
(navigator.userAgent.match(/Android/i)) ||
(navigator.userAgent.match(/webOS/i)) ||
(navigator.userAgent.match(/iPhone/i)) ||
(navigator.userAgent.match(/iPod/i)) ||
(navigator.userAgent.match(/iPad/i)) ||
(navigator.userAgent.match(/BlackBerry/))
);
}