$(document).ready(function () {
  var d = new Date();
  if (d.getMonth() == 11 || (d.getMonth() == 0 && d.getDate() <= 6)) {
    var body = $("body");
    var zona = "arredamento";
    if((location.host.indexOf("webmobili") != -1) || (location.host.indexOf("wmdemo") != -1)) zona = "arredamento";
    else if((location.host.indexOf("tavolaregalo") != -1) || (location.host.indexOf("trdemo") != -1)) zona = "art";
    else if((location.host.indexOf("internicasa") != -1) || (location.host.indexOf("icdemo") != -1)) zona = "idro";
    var i = 0;

    setInterval(function () {
      body.css("background-image", "url(http://" + location.host + "/layoutImages/stellineNatale/"+zona+"_" + i + ".gif)");
      body.css("background-position", "top center");
      body.css("background-repeat", "no-repeat");
      i++; i %= 3;
    },
      500
    );

  }
});