var browser = navigator.appName;
var b_versione = navigator.appVersion;
var versione = parseFloat(b_versione);
if (browser == "Netscape" || browser == "Opera")
  br = "ns";
else if (versione == 5)
	br = "ns";
else
  br = "ie";
limite = 0;
pos = 0;
counter = 0;
counter_fade = 0;
vel_fade = 1;
max_fade = 99;
min_fade = 11;
lim_min = min_fade+vel_fade
lim_max = max_fade-vel_fade

function roll_menu(m,n,t) {
  with (document) {
		if (n == 1) getElementById('voce_'+t+'_'+m).className = "menu_acceso";
		else getElementById('voce_'+t+'_'+m).className = "menu_spento";
	}
}

function mostra_news(n) {
	n_news = n;
	limite = n+1;
  with (document.getElementById('slide_1').style) {
		if (br == "ns") opacity = ".99";
		else filter = "alpha(opacity=99)";
		display = "block";
	}
	if (n > 1) timer_01 = setInterval('scorri_news(n_news)',10000);
}

function scorri_news(n) {
	counter = counter+1;
	if (counter == limite) counter = 1;
	timer_02 = setInterval('spegni_news(counter)',1);
}

function spegni_news(s) {
	lvl_01 = s;
	next = s+1;
  counter_fade = counter_fade+vel_fade;
	pos = 99-counter_fade;
  with (document.getElementById('slide_'+lvl_01).style) {
		if (pos <= lim_min) {
			ferma_fade(next);
			if (br == "ns") opacity = ".10";
			else filter = "alpha(opacity=10)";
			display = "none";
		} else {
			if (br == "ns") opacity = "."+pos;
			else filter = "alpha(opacity="+pos+")";
		}
	}
}

function ferma_fade(p) {
	if (p == limite) p = 1;
	prossima = p;
	pos = 0;
	counter_fade = 0;
	clearInterval(timer_02);
	if (p != 0) {
		document.getElementById('slide_'+p).style.display = "block";
 		timer_02 = setInterval('accendi_news(prossima)',1);
	}
}
function accendi_news(a) {
	lvl_02 = a;
  counter_fade = counter_fade+vel_fade;
	pos = 10+counter_fade;
  with (document.getElementById('slide_'+lvl_02).style) {
		if (pos >= lim_max) {
			ferma_fade(0);
			if (br == "ns") opacity = ".99";
			else filter = "alpha(opacity=99)";
		} else {
			if (br == "ns") opacity = "."+pos;
			else filter = "alpha(opacity="+pos+")";
		}
	}
}