Get the time n-1 a week ago including the current day 7 days a week 7-1

getLastweek: function (n) {
      var n = n;
      var d = new Date();
      var year = d.getFullYear();
      var mon = d.getMonth() + 1;
      var day = d.getDate();
      if (day <= n) {
        if (mon > 1) {
          mon = mon - 1;
        } else {
          year = year - 1;
          mon = 12;
        }
      }
      d.setDate(d.getDate() - n);
      year = d.getFullYear();
      mon = d.getMonth() + 1;
      day = d.getDate();
      s = year + "-" + (mon < 10 ? ('0' + mon) : mon) + "-" + (day < 10 ? ('0' + day) : day);
      return s;
    }