function initImage(imageId, NuovaImmagine) {
	image = document.getElementById(imageId);
	setOpacity(image, 0);
	image.src = NuovaImmagine;
	image.style.visibility = "visible";
	fadeIn(imageId, 0);
}

function fadeIn(objId,opacity) {
	if (document.getElementById) {
		obj = document.getElementById(objId);
		if (opacity < 100) {
			setOpacity(obj, opacity);
			
            if (window.ActiveXObject){
			    opacity += 5; // se IE
			}else{
			    opacity += 2; // se altri
			}
			
			window.setTimeout("fadeIn('"+objId+"',"+opacity+")", 45);
		}else{
		    operatore = document.getElementById('entra');
		    operatore.style.visibility = "visible";
		}
	}
}