Usage

$(function() {
  var Accordion = $('#accordion');

  Accordion.switchable({
    triggers: Accordion.find('b'),
    triggerType: 'click',
    effect: 'horizAccordion',
    easing: 'cubic-bezier(.1, .5, .1, 1)',
    customProps: {
      width: '40px'
    },
    autoplay: true,
    beforeSwitch: function(event, toIndex) {
      // if beforeSwitch() returns 'false', the switch event stops
      return this.index !== toIndex;
    }
  });
});

/*
 * Remember to set the border-width for the accordion's panels,
 * even without border
 */
#accordion li {
  border: 0;
}