$(function () {
    var Accordion = function (el, multiple) {
      this.el = el || {};
      this.multiple = multiple || false;
      var links = this.el.find(".link");
      links.on("click", { el: this.el, multiple: this.multiple }, this.dropdown);
    };
    Accordion.prototype.dropdown = function (e) {
      var $el = e.data.el;
      ($this = $(this)), ($next = $this.next());
      $next.slideToggle();
      $this.parent().toggleClass("open");
      if (!e.data.multiple) {
        $el.find(".submenu").not($next).slideUp().parent().removeClass("open");
      }
    };
    var accordion = new Accordion($("#accordion"), false);
    for (let i = 1; i < 13; i++) {
      var c = new Accordion($(`#accordion${i}`), false);
    }
});