var http_request = false;
var tempoSfumata;
var tempoNascondiMenu;
var opacity;



function makeRequest(url) {

    http_request = false;
		if (window.XMLHttpRequest) { // Mozilla, Safari,...
			http_request = new XMLHttpRequest();
			if (http_request.overrideMimeType) {
				http_request.overrideMimeType('text/xml');
			}
		}
		else if (window.ActiveXObject) { // IE
			try {
				http_request = new ActiveXObject("Msxml2.XMLHTTP");
			} 
			catch (e) {
				try {http_request = new ActiveXObject("Microsoft.XMLHTTP");
				}
				catch (e) {
				}
			}
		}
		if (!http_request) {
			alert('Giving up :( Cannot create an XMLHTTP instance');
			return false;
		}
		
	
	http_request.onreadystatechange = alertContents;
	http_request.open('GET', url, true);
	http_request.send(null);
}

function alertContents() {
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			document.getElementById('presentazione').innerHTML = http_request.responseText;
		
		}
		else {
			alert('There was a problem with the request.');
		}
    }
} 

function mostraFotoClassica(){
			document.getElementById('fotoClassica1').style.visibility = 'visible';
			document.getElementById('fotoClassica1').style.display = 'block';
			document.getElementById('fotoClassica2').style.visibility = 'visible';
			document.getElementById('fotoClassica2').style.display = 'block';
			document.getElementById('fotoClassica3').style.visibility = 'visible';
			document.getElementById('fotoClassica3').style.display = 'block';
			document.getElementById('fotoModerna1').style.visibility = 'hidden';
			document.getElementById('fotoModerna1').style.display = 'none';
			document.getElementById('fotoModerna2').style.visibility = 'hidden';
			document.getElementById('fotoModerna2').style.display = 'none';
			document.getElementById('fotoModerna3').style.visibility = 'hidden';
			document.getElementById('fotoModerna3').style.display = 'none';
			document.getElementById('fotoHipHop1').style.visibility = 'hidden';
			document.getElementById('fotoHipHop1').style.display = 'none';
			document.getElementById('fotoHipHop2').style.visibility = 'hidden';
			document.getElementById('fotoHipHop2').style.display = 'none';
			document.getElementById('fotoHipHop3').style.visibility = 'hidden';
			document.getElementById('fotoHipHop3').style.display = 'none';
			
}

function mostraFotoModerna(){
			
			document.getElementById('fotoClassica1').style.visibility = 'hidden';
			document.getElementById('fotoClassica1').style.display = 'none';
			document.getElementById('fotoClassica2').style.visibility = 'hidden';
			document.getElementById('fotoClassica2').style.display = 'none';
			document.getElementById('fotoClassica3').style.visibility = 'hidden';
			document.getElementById('fotoClassica3').style.display = 'none';
			document.getElementById('fotoModerna1').style.visibility = 'visible';
			document.getElementById('fotoModerna1').style.display = 'block';
			document.getElementById('fotoModerna2').style.visibility = 'visible';
			document.getElementById('fotoModerna2').style.display = 'block';
			document.getElementById('fotoModerna3').style.visibility = 'visible';
			document.getElementById('fotoModerna3').style.display = 'block';
			document.getElementById('fotoHipHop1').style.visibility = 'hidden';
			document.getElementById('fotoHipHop1').style.display = 'none';
			document.getElementById('fotoHipHop2').style.visibility = 'hidden';
			document.getElementById('fotoHipHop2').style.display = 'none';
			document.getElementById('fotoHipHop3').style.visibility = 'hidden';
			document.getElementById('fotoHipHop3').style.display = 'none';
		
}
function mostraFotoHipHop(){
			
			document.getElementById('fotoClassica1').style.visibility = 'hidden';
			document.getElementById('fotoClassica1').style.display = 'none';
			document.getElementById('fotoClassica2').style.visibility = 'hidden';
			document.getElementById('fotoClassica2').style.display = 'none';
			document.getElementById('fotoClassica3').style.visibility = 'hidden';
			document.getElementById('fotoClassica3').style.display = 'none';
			document.getElementById('fotoModerna1').style.visibility = 'hidden';
			document.getElementById('fotoModerna1').style.display = 'none';
			document.getElementById('fotoModerna2').style.visibility = 'hidden';
			document.getElementById('fotoModerna2').style.display = 'none';
			document.getElementById('fotoModerna3').style.visibility = 'hidden';
			document.getElementById('fotoModerna3').style.display = 'none';
			document.getElementById('fotoHipHop1').style.visibility = 'visible';
			document.getElementById('fotoHipHop1').style.display = 'block';
			document.getElementById('fotoHipHop2').style.visibility = 'visible';
			document.getElementById('fotoHipHop2').style.display = 'block';
			document.getElementById('fotoHipHop3').style.visibility = 'visible';
			document.getElementById('fotoHipHop3').style.display = 'block';
}


function mostraFotoPredanza(){
			document.getElementById('fotoClassica1').style.visibility = 'hidden';
			document.getElementById('fotoClassica1').style.display = 'none';
			document.getElementById('fotoClassica2').style.visibility = 'hidden';
			document.getElementById('fotoClassica2').style.display = 'none';
			document.getElementById('fotoClassica3').style.visibility = 'hidden';
			document.getElementById('fotoClassica3').style.display = 'none';
			document.getElementById('fotoModerna1').style.visibility = 'hidden';
			document.getElementById('fotoModerna1').style.display = 'none';
			document.getElementById('fotoModerna2').style.visibility = 'hidden';
			document.getElementById('fotoModerna2').style.display = 'none';
			document.getElementById('fotoModerna3').style.visibility = 'hidden';
			document.getElementById('fotoModerna3').style.display = 'none';
			document.getElementById('fotoHipHop1').style.visibility = 'hidden';
			document.getElementById('fotoHipHop1').style.display = 'none';
			document.getElementById('fotoHipHop2').style.visibility = 'hidden';
			document.getElementById('fotoHipHop2').style.display = 'none';
			document.getElementById('fotoHipHop3').style.visibility = 'hidden';
			document.getElementById('fotoHipHop3').style.display = 'none';

}

function mostraFotoMatwork(){
			document.getElementById('fotoClassica1').style.visibility = 'hidden';
			document.getElementById('fotoClassica1').style.display = 'none';
			document.getElementById('fotoClassica2').style.visibility = 'hidden';
			document.getElementById('fotoClassica2').style.display = 'none';
			document.getElementById('fotoClassica3').style.visibility = 'hidden';
			document.getElementById('fotoClassica3').style.display = 'none';
			document.getElementById('fotoModerna1').style.visibility = 'hidden';
			document.getElementById('fotoModerna1').style.display = 'none';
			document.getElementById('fotoModerna2').style.visibility = 'hidden';
			document.getElementById('fotoModerna2').style.display = 'none';
			document.getElementById('fotoModerna3').style.visibility = 'hidden';
			document.getElementById('fotoModerna3').style.display = 'none';
			document.getElementById('fotoHipHop1').style.visibility = 'hidden';
			document.getElementById('fotoHipHop1').style.display = 'none';
			document.getElementById('fotoHipHop2').style.visibility = 'hidden';
			document.getElementById('fotoHipHop2').style.display = 'none';
			document.getElementById('fotoHipHop3').style.visibility = 'hidden';
			document.getElementById('fotoHipHop3').style.display = 'none';

}
function mostraFotoGirokinesis(){
			document.getElementById('fotoClassica1').style.visibility = 'hidden';
			document.getElementById('fotoClassica1').style.display = 'none';
			document.getElementById('fotoClassica2').style.visibility = 'hidden';
			document.getElementById('fotoClassica2').style.display = 'none';
			document.getElementById('fotoClassica3').style.visibility = 'hidden';
			document.getElementById('fotoClassica3').style.display = 'none';
			document.getElementById('fotoModerna1').style.visibility = 'hidden';
			document.getElementById('fotoModerna1').style.display = 'none';
			document.getElementById('fotoModerna2').style.visibility = 'hidden';
			document.getElementById('fotoModerna2').style.display = 'none';
			document.getElementById('fotoModerna3').style.visibility = 'hidden';
			document.getElementById('fotoModerna3').style.display = 'none';
			document.getElementById('fotoHipHop1').style.visibility = 'hidden';
			document.getElementById('fotoHipHop1').style.display = 'none';
			document.getElementById('fotoHipHop2').style.visibility = 'hidden';
			document.getElementById('fotoHipHop2').style.display = 'none';
			document.getElementById('fotoHipHop3').style.visibility = 'hidden';
			document.getElementById('fotoHipHop3').style.display = 'none';

}



//function loadpage(page_request, containerid){
//if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1))
//document.getElementById(containerid).innerHTML=page_request.responseText
//}

//<a href="javascript:ajaxpage('test.htm', 'contentarea');">test</a>
//<div id="contentarea"></div>

function mostraMenu() {
	clearTimeout (tempoNascondiMenu);
	clearInterval (tempoSfumata);
	opacity = 100;
	document.getElementById('elencoMenu').style.filter = 'alpha(opacity='+opacity+')'; //per IE
	document.getElementById('elencoMenu').style.opacity = opacity/100; //per CSS3 Standard

	document.getElementById('elencoMenu').style.visibility = 'visible';
	document.getElementById('menuMenu').style.display = 'none';
	document.getElementById('menuHome').style.display = 'block';
}

function nascondiMenu() {
	tempoNascondiMenu = setTimeout (sfumaMenu, 3000);
}


function sfumaMenu() {
	opacity = opacity - 2;
	
	document.getElementById('elencoMenu').style.filter = 'alpha(opacity=' + opacity + ')';
	document.getElementById('elencoMenu').style.opacity = opacity/100;
	
	clearInterval(tempoSfumata);	
	if (opacity < 0) {
		opacity = 0;
		document.getElementById('elencoMenu').style.visibility = 'hidden';
		document.getElementById('menuMenu').style.display = 'block';
		document.getElementById('menuHome').style.display = 'none';
	} else {
		tempoSfumata = setInterval(sfumaMenu,100); //reiterazione
	}
}

function mostraLogo(){
document.getElementById('logoTesto').style.visibility = 'visible';
document.getElementById('logoTesto').style.display = 'block';

}

function sfumaLogo(){
opacity = 1;
document.getElementById('logoDiv').style.filter = 'alpha(opacity='+4+')'; //per IE
document.getElementById('logoDiv').style.opacity = 0.4; //per CSS3 Standard
}

function ripristinaLogo(){
document.getElementById('logoTesto').style.visibility = 'hidden';
document.getElementById('logoTesto').style.display = 'none';
document.getElementById('logoDiv').style.filter = 'alpha(opacity='+1+')';
document.getElementById('logoDiv').style.opacity = 1;
}