Event.observe(window, 'load', loadAccordions);

function loadAccordions() {
  if($('events') || $('about')){
    var verticalAccordions = $$('.accordion_toggle');
    verticalAccordions.each(function(accordion) {
      Event.observe(accordion, 'click', function(){
        accordion.next(0).toggle();
        accordion.toggleClassName('accordion_toggle_active');
      });
    });
  }
}