var accordion;
var accordionTogglers;
var accordionContents;

window.onload = function() {
  accordionTogglers = document.getElementsByClassName('accToggler');

  accordionTogglers.each(function(toggler){
    //remember the original color
    toggler.origColor = toggler.getStyle('background-color');
    //set the effect
    toggler.fx = new Fx.Style(toggler, 'background-color');
  });

  accordionContents = document.getElementsByClassName('accContent');

  accordion = new Fx.Accordion(accordionTogglers, accordionContents,
  {
    onActive: function(toggler){toggler.fx.start('#d6f2e1');},
    onBackground: function(toggler){
      //change the background color to the original (green)
      //color when another toggler is pressed
      toggler.setStyle('background-color', toggler.origColor);
    }
  });
};