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.Color(toggler, 'background-color');
});

accordionContents = document.getElementsByClassName('accContent');

accordion = new Fx.Accordion(accordionTogglers,
accordionContents,{
//when an element is opened change the
//background color to blue
onActive: function(toggler){
toggler.fx.toColor('#588526');
},
onBackground: function(toggler){
//change the background color to the original (green)
//color when another toggler is pressed
toggler.setStyle('background-color', toggler.origColor);
}
});
}