function next() {
	vu = true;
	if(index < total-1 && action) {
		action = false;
		leftPos = parseInt(bandeau.style.marginLeft);
		timer = setInterval("moveNext(leftPos, largeurs[index])", vitesse);
	} else if(action) {
		index = total-1;
	}
}
function prev() {
	/*if (index == 0) {
		if(vu) {
			document.getElementById('left-arrow').style.opacity = negatif;
			//alert('Vous êtes revenu(e) au début.\nCliquez sur la flèche de droite pour voir les autres articles');
		} else {
			document.getElementById('left-arrow').style.opacity = '1';
			//alert("Cliquez sur la flèche de droite pour commencer.");
		}
	} else*/ if(index > 0 && action) {
		action = false;
		if (index == 1) {
			document.getElementById('retour').style.display = 'none';
		}
		leftPos = parseInt(bandeau.style.marginLeft);
		index -= 1;
		timer = setInterval("movePrev(leftPos, largeurs[index])", vitesse);
	} else if(action) {
		index = 0;
		bandeau.style.marginLeft = 50+"px";
	}
}
function moveNext(start,end) {
	var max = start - end;
	document.getElementById('left-arrow').style.opacity = '1';
	increment = Math.round(largeurs[index]/diviseur);
	var newPos = parseInt(bandeau.style.marginLeft);
	if(newPos <= max) {
		bandeau.style.marginLeft = max +"px";
		index += 1;
		//document.getElementById('titre').innerHTML = titres[index];
		action = true;
		clearInterval(timer);
		//document.getElementById('result').innerHTML = start+" | "+end+" | "+max+" | "+newPos+" | "+increment+" | "+index;
		if (index > 0) {
			document.getElementById('retour').style.display = 'block';
		}
		if (index == total-1) {
			document.getElementById('right-arrow').style.opacity = negatif;
		}
	} else {
		bandeau.style.marginLeft = newPos - increment +"px";
		//document.getElementById('result').innerHTML = start+" | "+end+" | "+max+" | "+newPos+" | "+increment+" | "+index;
	}
}
function movePrev(start,end) {
	var max = end + start;
	increment = Math.round(largeurs[index]/diviseur);
	var newPos = parseInt(bandeau.style.marginLeft);
	document.getElementById('right-arrow').style.opacity = '1';
	if(newPos >= max) {
		bandeau.style.marginLeft = max +"px";
		//document.getElementById('titre').innerHTML = titres[index];
		action = true;
		clearInterval(timer);
		//document.getElementById('result').innerHTML = start+" | "+end+" | "+max+" | "+newPos+" | "+increment+" | "+index;
	} else {
		bandeau.style.marginLeft = newPos + increment +"px";
		//document.getElementById('result').innerHTML = start+" | "+end+" | "+max+" | "+newPos+" | "+increment+" | "+index;
	}
	if (parseInt(bandeau.style.marginLeft)==50) {
		document.getElementById('left-arrow').style.opacity = negatif;
	}
}

function retour() {
	action = false;
	leftPos = parseInt(bandeau.style.marginLeft);
	document.getElementById('retour').style.display = 'none';
	index = 0;
	document.getElementById('right-arrow').style.opacity = '1';
	timer = setInterval("moveBack(leftPos, 50)", 1);
}

function moveBack(start,end) {
	increment = Math.round(largeurs[0]/diviseur);
	var newPos = parseInt(bandeau.style.marginLeft);
	if(newPos >= end) {
		bandeau.style.marginLeft = end +"px";
		//document.getElementById('titre').innerHTML = titres[index];
		action = true;
		clearInterval(timer);
		if (parseInt(bandeau.style.marginLeft)==50) {
			document.getElementById('left-arrow').style.opacity = negatif;
			//document.getElementById('titre').innerHTML = titres[0];
			document.getElementById('titre').innerHTML = baseTitle;
		}
		//document.getElementById('result').innerHTML = start+" | "+end+" | "+0+" | "+newPos+" | "+increment+" | "+index;
	} else {
		bandeau.style.marginLeft = newPos + 50 +"px";
		document.getElementById('titre').innerHTML = "...";
		//document.getElementById('result').innerHTML = start+" | "+end+" | "+0+" | "+newPos+" | "+increment+" | "+index;
	}
}