var cur_actu = false;
var nb_actu = 0;
var is_timeout_actu = true;
var delai = 4000;
var timeout_actu = 0;
var actus = new Array();
var correspondance = new Array();
var cur_numero = false;

$(document).ready(function(){ 
	nb_actu = $('.item_actu').length;
	if (nb_actu) {
		$('.item_actu').each(function(i){
			var t_id = $(this).attr('id');
			if (t_id) {
				actus[i] = t_id;
				correspondance[t_id] = i;
			}
		});
		if (nb_actu < 2) is_timeout_actu = false;
		var first_id = $('.item_actu:first').attr('id');
		/*if (first_id) {
			active_diapo(first_id);
		}*/
		
		$('.item_actu').click(function(){
			clearTimeout ( timeout_actu );
			is_timeout_actu = false;
			active_diapo(correspondance[$(this).attr('id')]);
		});
		
		actu_suivante();
	}
}); 

function active_diapo(diap_num) {
	var diap_id = actus[diap_num];
	if (cur_numero == diap_id) return;
	if (cur_actu) {
		$('#actu_' + cur_actu).fadeOut('slow');
		$('#description_' + cur_actu).hide();
	}
	$('#actu_' + diap_id).fadeIn('slow');
	$('#description_' + diap_id).show().css({
		opacity : 0.7
	});
	cur_actu = diap_id;
	cur_numero = diap_num;
}

function actu_suivante() {
	if (cur_numero === false) {
		var next_actu = 0;
	} else {
		if (cur_numero == (nb_actu - 1)) var next_actu = 0;
		else var next_actu = cur_numero + 1;
	}
	active_diapo(next_actu);
	if (is_timeout_actu) {
		timeout_actu = setTimeout ( 'actu_suivante()', delai );
	}
}