function isMobile(){
   
    return ((navigator.platform.indexOf("iPhone") != -1) || 
			(navigator.platform.indexOf("iPad") != -1) ||  
			(navigator.platform.indexOf("iPod") != -1) || 
			(navigator.platform.indexOf("android") != -1));
}

if(isMobile()){
    window.location = "mobile/index.php";
}