var isSPN = function(){
  if (((navigator.userAgent.indexOf('iPhone') > 0 &&
  navigator.userAgent.indexOf('iPad') == -1) ||
  navigator.userAgent.indexOf('iPod') > 0 ||
  navigator.userAgent.indexOf('IEMobile') > 0 ||
  navigator.userAgent.indexOf('Android') > 0 ||
  navigator.userAgent.indexOf('BlackBerry') > 0)) {
    return true;
  }else{
    return false;
  }
}