function vai(){
	alert("ciao");
}



var isNet, Vers;

if (navigator.appName=="Netscape"){
	isNet = true;
	Vers = navigator.appVersion;
	Vers = parseFloat(Vers.substring(0, Vers.indexOf(" ")));
}
else{
	isNet = false;
	Vers = navigator.userAgent;
	Vers = parseFloat(Vers.substr(Vers.indexOf("MSIE")+4, 5));
}


function show_credits(){	
	if(isNet){
		altezzaClient = window.innerHeight;
		creditsX =(Math.round(screen.width/4.5));
		creditsY =(Math.round(altezzaClient/4));
		if(Vers<5){
			obj = document.layers["credits"];
			//obj.top = creditsY;
			//obj.left = creditsX;
			obj.visibility="show";
		}
		else{
			obj = document.getElementById("credits").style;
			//obj.top = creditsY;
			//obj.left = creditsX;
			obj.visibility="visible";
			fadein();
		}
	}
	else{
		altezzaClient = document.body.clientHeight;
		creditsX =(Math.round(screen.width/4.5));
		creditsY =(Math.round(altezzaClient/4));
		if(Vers<5){
			obj = document.all["credits"].style;
			//obj.top = creditsY;
			//obj.left = creditsX;
			obj.visibility="visible";
			fadein();
		}
		else{
			obj = document.getElementById("credits").style;
			//obj.top = creditsY;
			//obj.left = creditsX;
			obj.visibility="visible";
			fadein();
		}
	}
}
	
function hide_credits(){
	if(isNet){
		if(Vers<5) document.layers["credits"].visibility="hide";
		else{
			clearInterval(crediteffect);
			obj = document.getElementById("credits").style;
			obj.visibility="hidden";
			obj.MozOpacity=0;
		}
	}
	else{
		clearInterval(crediteffect);
		if(Vers<5){
			obj = document.all["credits"];
			obj.style.visibility="hidden";
			obj.filters.alpha.opacity=0;			
		}
		else{
			obj = document.getElementById("credits");
			obj.style.visibility="hidden";
			obj.filters.alpha.opacity=0;
		}
	}
}
	
function fadein(){
	crediteffect = setInterval("applyfade()", 100);
}
	
function applyfade(){
	if(isNet){
		obj = document.getElementById("credits").style;
		alpha = parseFloat(obj.MozOpacity);
		if(alpha<1) obj.MozOpacity = alpha + 0.1;	
		else clearInterval(crediteffect);
	}
	else{
		if(Vers<5) obj = document.all["credits"];
		else obj = document.getElementById("credits");
		alpha = obj.filters.alpha.opacity;
		if(alpha<100) obj.filters.alpha.opacity = alpha + 10;
		else clearInterval(crediteffect);
	}	
}


var strDiv;
var strDivClose;

if(isNet && (Vers < 5)){
	strDiv="<div id=\"credits\">"
}else{
	strDiv="<div id=\"credits\" style=\"filter:alpha(opacity=10);-moz-opacity:0;\">"
}
strDivClose="</div>";