/* Choix de l'effet et temps entre les images */
var time = 8;
var nbImage = 3;

/**********************************************/

var current_image = 1;
var next_image = 2;
var image = new Array();

function init() {
	$$(".image").invoke("hide");
	$("header-image-1").show();	
	//new PeriodicalExecuter(nextimage, time);		
}

function nextimage() {
	if (Prototype.Browser.IE && parseInt(navigator.userAgent.substring(navigator.userAgent.indexOf("MSIE")+5)) == 6){
			$("header-image-" + current_image).hide(); 
			$("header-image-" + next_image).show();
		}
	else {
		new Effect.Fade($("header-image-" + current_image), {duration:time/4, from:1.0, to:0.01}); 
		new Effect.Appear($("header-image-" + next_image), {duration:time/4, from:0.0, to:1.0});
	}
	
	if(next_image == nbImage) {
		current_image = next_image;
		next_image = 1;
	} else {
		current_image = next_image;
		next_image++;
	}	
}

/**********************************************/
function afficher_images()
{ 
	var num  = Math.round((Math.random()*2)+1);  
	document.write('<div id="header-image-' + num+ '" class="image">&nbsp;</div>');
	num  += 1;
	if (num ==4 ){ num = 1; } ; 
	document.write('<div id="header-image-' + num+ '" class="image">&nbsp;</div>');
	num  += 1;
	if (num ==4 ){ num = 1; } ; 
	document.write('<div id="header-image-' + num+ '" class="image">&nbsp;</div>');   
}