var userAgent = navigator.userAgent.toLowerCase();

var devices = new Array('nokia','iphone','blackberry','sony','lg',
'htc_tattoo','samsung','symbian','SymbianOS','elaine','palm',
'series60','windows ce','android','obigo','netfront',
'openwave','mobilexplorer','operamini');

function mobiDetect(userAgent, devices) {
    
  for(var i = 0; i < devices.length; i++) {
        
    if (userAgent.search(devices[i]) > 0) {
               
       return true;
        }
    }
    
       return false;
}


     if (mobiDetect(userAgent, devices)) {
    
       window.location.href = url_redirect;
}