window.addEvent('domready', function(){
  var accordeon = new Accordion('h2.accordeon', 'div.accordeon', {
    opacity: false,
    alwaysHide: true,
    show: 0,
    duration: 1333,
    transition: Fx.Transitions.linear,
   onActive: function(heading2, innertext){},
  	onBackground: function(heading2, innertext){}
  }, $('big_left'));
});