Javascript OS mobile detection with url redirect

OSMobileRedir.js

/* Zilli 201102
To detect the OS mobile system on the client device, 
match the value of navigator.userAgent,
then redirect to mobile url with the location.replace value. 
*/
 
if (navigator.userAgent.match(/Android/i)
   || navigator.userAgent.match(/webOS/i)
   || navigator.userAgent.match(/iPhone/i)
   || navigator.userAgent.match(/iPad/i)
   || navigator.userAgent.match(/iPod/i)
   || navigator.userAgent.match(/BlackBerry/i)
   || navigator.userAgent.match(/Windows Phone/i)
   || navigator.userAgent.match(/Opera Mini/i)
   || navigator.userAgent.match(/IEMobile/i)
    ) {
    location.replace("index-mobile.html");
}