function accordion(id){
	$(id).observe('click', 
	function(e){
	var a = Event.element(e);			
	var content = $(id+'Content');
	var options = { duration: 1 };
	a.blur();

	if(content.visible()){
		new Effect.BlindUp(content, options);
		a.className = 'show';
		} else {
			new Effect.BlindDown(content, options);
		a.className = 'hide';
		}
	Event.stop(e);
	}
	);		
	
};
function retouraccordion(id){
	$(id+'-retour').observe('click', 
	function(e){
	var a = Event.element(e);			
	var content = $(id+'Content');
	var options = { duration: 1 };
	a.blur();
	
	if(content.visible()){
		new Effect.BlindUp(content, options);
		a.className = 'show';
		} else {
			new Effect.BlindDown(content, options);
		a.className = 'hide';
		}
	Event.stop(e);
	}
	);		
	
};