(function(){	
  //get UserAgent
  var ua = navigator.userAgent;

  //shown confirm popup.
  if(	(ua.indexOf('iPhone', 0) != -1) && (ua.indexOf('iPod') == -1) && (ua.indexOf('iPad', 0) == -1)) {
    alert();
  }
  //include Android && mobile
  else if((ua.indexOf('Android', 0) != -1) && (ua.indexOf('Mobile', 0) != -1)) {
    alert();									
  }

  function alert() {
    var ret = confirm("スマートフォン用サイトに移動しますか？");

    if(ret == true) {
      location.href = "http://mb.store.uniqlo.com/mb_material/gu/index.jsp?cid=sp_alert_gu";
    }	
  }
})();