GoogleAppsScriptを使ってgoogleフォームの記入に期限を付ける

function endFormCheck() {
  
  var today = new Date();
  var firstday =  new Date(today.getFullYear(), today.getMonth(), 1);//1日を取得
  var fiveday =  new Date(today.getFullYear(), today.getMonth(), 5);//5日を取得
  
  var today = Utilities.formatDate(today, "Asia/Tokyo", "yyyy-MM-dd");
  var firstday = Utilities.formatDate(firstday, "Asia/Tokyo", "yyyy-MM-dd");
  var fiveday = Utilities.formatDate(fiveday, "Asia/Tokyo", "yyyy-MM-dd");
  var form = FormApp.getActiveForm();
  //var LIMIT_COUNT = 3; //ここでカウント上限を設定
  
  Logger.log(today);
  Logger.log(firstday);
  Logger.log(fiveday);
  
  //if (form.getResponses().length >= LIMIT_COUNT) {
  
  if (today >= firstday && today <= fiveday) {
    form.setAcceptingResponses(true);
    Logger.log("期間内");
  }else{
    form.setAcceptingResponses(false);
    Logger.log("期間外");
    //上記は、http://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q11115562281を参考に作成
  }
  
}