
function tree(){

$(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);
});
}
