var arrayHPImg = ["img_azienda","img_contatti_br","img_commerc_br","img_residenz_br"]; //almeno 2 elementi
var number_of_images = arrayHPImg.length;

var currentImg;
var nextImg;

function loadAndShow() {
	if($("fade"+nextImg).complete) {
		new Effect.Fade('fade'+currentImg, { duration: 0.5 } );
		new Effect.Appear('fade'+nextImg, { duration: 0.5 } );
		
		currentImg = nextImg;
		nextImg = (currentImg + 1) % number_of_images;
		
		if(nextImg>1) {
			$("fade"+nextImg).src = "images/" + arrayHPImg[nextImg] + ".jpg";
			setTimeout("loadAndShow()", 3500);
		} else {
			setTimeout("show()", 3500);
		}
		
	} else {
		setTimeout("loadAndShow()", 1000);
	}
}

function show() {
	new Effect.Fade('fade'+currentImg, { duration: 0.5 } );
	new Effect.Appear('fade'+nextImg, { duration: 0.5 } );
		
	currentImg = nextImg;
	nextImg = (currentImg + 1) % number_of_images;
		
	setTimeout("show()", 3500);
}

function imgSplash(){
	currentImg = 0;
	nextImg = 1;
	for(i=0; i<number_of_images; i++)
		$("fade"+i).style.display = (i==0) ? "" : "none";
	$("fade"+nextImg).src = "images/" + arrayHPImg[nextImg] + ".jpg";
	setTimeout("loadAndShow()", 3500);
}//inizio

Event.observe(window, 'load', imgSplash);