function hideCurrent(current){
	$('slide_'+current).setStyle('left', 687);
}

function goNext(current){
	cpt = 0;
	if(current == 4) var next = 1;
	else var next = current+1;
	
	if(next==4) $('next_bouton').set('html',1+'/4');
	else $('next_bouton').set('html',(next+1)+'/4');
	$('prec_bouton').set('html',current+'/4');
	
	$('slide_'+current).setStyle('zIndex', 3);
	$('slide_'+next).setStyle('left', 687);
	$('slide_'+next).setStyle('zIndex', 5);

	new Fx.Move($('slide_'+next), {
	  relativeTo: $('slides'),
	  position: 'upperLeft',
	  duration: 1000
	}).start();
	
	setTimeout("hideCurrent("+current+")",1000);

	return next;
}

function goPrec(current){
	cpt = 0;
	if(current == 1) var prec = 4;
	else var prec = current-1;
	
	if(prec==1) $('prec_bouton').set('html',4+'/4');
	else $('prec_bouton').set('html',(prec-1)+'/4');
	$('next_bouton').set('html',current+'/4');
	
	$('slide_'+current).setStyle('zIndex', 3);
	$('slide_'+prec).setStyle('left', -687);
	$('slide_'+prec).setStyle('zIndex', 5);

	new Fx.Move($('slide_'+prec), {
	  relativeTo: $('slides'),
	  position: 'upperLeft',
	  duration: 1000
	}).start();
	
	setTimeout("hideCurrent("+current+")",1000);

	return prec;
}

var current = 1;
var cpt = 0;
var autoplay = 1;
var timing = 7;

function cptIncrement(){
	cpt++;
	setTimeout("cptIncrement()", 1000);
	if(autoplay==1 && cpt==timing){
		current = goNext(current);
		cpt = 0;
	}
}
setTimeout("cptIncrement()", 1000);

function stopAutoPlay(){
	$('pause_bouton').hide();
	$('play_bouton').show();
	
	autoplay = 0;
	cpt = 0;
}

function startAutoPlay(){
	$('pause_bouton').show();
	$('play_bouton').hide();
	
	autoplay = 1;
	cpt = timing-1;
}

document.addEvent('domready',function(){
	$('next_bouton').addEvent('click',function(){
		stopAutoPlay();
		current = goNext(current);
	});	
	$('prec_bouton').addEvent('click',function(){
		stopAutoPlay();
		current = goPrec(current);
	});
	$('pause_bouton').addEvent('click',function(){
		stopAutoPlay();
	});
	$('play_bouton').addEvent('click',function(){
		startAutoPlay();
	});
});