$(function() {
    var $getdt = $('dl#slide > dt');
    var $getdd = $('dl#slide > dd');

    $getdt.each(function() {
      $(this).click(function() {
        if (this.id.indexOf('item') != -1) {
          var thisParent = this;
          $getdd.each(function() {
            if (this.id.indexOf(thisParent.id) != -1 && this.className == '') {
              var ulHeight = $(this).children('ul').get(0).offsetHeight;
              $(this).stop().animate({ height: ulHeight + 'px' }, 450);
            }
            else {
              if (this.offsetHeight > 0) {
                $(this).stop().animate({ height: 0 }, 450);
              }
            }

            if (this.id.indexOf(thisParent.id) != -1 && this.className == '') {
              $(this).addClass('selected'); 
              $(thisParent).addClass('slide');
            }
            else {
              $(this).removeClass();
              var ePrevious = this.previousSibling;
              while (ePrevious.nodeType != 1) { ePrevious = ePrevious.previousSibling; }
              $(ePrevious).removeClass();  
            }
          }); // end of $getdd.each
        }   // end of if
      }); // end of click
    }); // end of $getdt.each
  });