function ___getPageScroll() {var xScroll, yScroll;if (self.pageYOffset) {yScroll = self.pageYOffset;xScroll = self.pageXOffset;} else if (document.documentElement && document.documentElement.scrollTop) {	 yScroll = document.documentElement.scrollTop;xScroll = document.documentElement.scrollLeft;} else if (document.body) {yScroll = document.body.scrollTop;xScroll = document.body.scrollLeft;	}arrayPageScroll = new Array(xScroll,yScroll);return arrayPageScroll;};
function ___getPageSize() {
	var xScroll, yScroll;
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = window.innerWidth + window.scrollMaxX;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		if(document.documentElement.clientWidth){
			windowWidth = document.documentElement.clientWidth; 
		} else {
			windowWidth = self.innerWidth;
		}
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}
	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = xScroll;		
	} else {
		pageWidth = windowWidth;
	}
	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight);
	return arrayPageSize;
};
function mostraMessaggio(tipologia,titoloMsg,msg,classe,idDiv){
	/*	TIPOLOGIA:	1= Creo div centrato
					2= Mostro alert classico
					3= Mostro in un div esistente {serve anche l'idDiv}
		CLASSE:		Parametro per la classe del div in cui mostro il messaggio*/
	//$("object").hide();
	if(tipologia==1){
		$("body").append("<div id=\"velinaMessaggio\">&nbsp;</div><div id=\"mostraMessaggio\"><div class=\"dim2 "+ classe +"\">"+ titoloMsg +"</div><span class=\"dim3\">"+ msg +"</span></div>");
		cssMessaggio("mostraMessaggio");
	}
	else if(tipologia==2)
		alert(titoloMsg.replace("<br />","\n") +"\n"+ msg.replace("<br />","\n"));
	else if(tipologia==3)
		$("#"+ idDiv).html(titoloMsg +"<br />"+ msg);
}
function cssMessaggio(id){
	var arrPageSizes = ___getPageSize();
	var arrPageScroll= ___getPageScroll();
	$("#"+id).hide();
	altoPage=arrPageSizes[3];					largoPage=arrPageSizes[2];
	alto=500;									largo=$("#"+id).width();
	topo=((altoPage-alto)/2)+arrPageScroll[1];	
	lefto=((largoPage-largo)/2)+arrPageScroll[0];
	$("#velinaMessaggio").hide().css({ 
			backgroundColor: '#000', opacity:'0.8', width: arrPageSizes[0], height: arrPageSizes[1]
		}).fadeIn(
		function(){$("#"+id).hide().css({top:topo,left:lefto}).show();}
	);
	$(".chiudiDivMessaggio,#velinaMessaggio,#mostraMessaggio").click(function(){ killMessaggio();});
	// If window was resized, calculate the new overlay dimensions
	$(window).resize(function() {
		// Get page sizes
		var arrPageSizes = ___getPageSize();
		var arrPageScroll= ___getPageScroll();
		altoPage=arrPageSizes[3];					largoPage=arrPageSizes[2];
		alto=$("#"+id).height();					largo=$("#"+id).width();
		topo=((altoPage-alto)/2)+arrPageScroll[1];	
		lefto=((largoPage-largo)/2)+arrPageScroll[0];
		
		// Style overlay and show it
		$('#velinaMessaggio').css({
			width:		arrPageSizes[0],
			height:		arrPageSizes[1]
		});
		// Get page scroll
		var arrPageScroll = ___getPageScroll();
		// Calculate top and left offset for the jquery-lightbox div object and show it
		$("#"+id).css({
			top:	topo,
			left:	lefto
		});
	});
}
function killMessaggio(){
	//$("object").show();
	$("#mostraMessaggio").remove();
	$("#mostraMessaggioPage").remove();
	$("#velinaMessaggio").fadeOut(function() { $("#velinaMessaggio").remove(); });
}

function fading(){
	posCurr++;
	if(posCurr>=arrSfondi.length)
		posCurr=0;
	
	
	currImg=arrSfondi[posCurr];
	$("<div class=\"tmpDiv\">&nbsp;</div>").css("background-image","url(../contenuti/testata/"+ currImg +")").appendTo("#focus").fadeIn("slow",function(){
		$("#focus").css("background-image","url(../contenuti/testata/"+ currImg +")");
		$(this).remove();
		/*$(this).fadeOut("slow",function(){
			$(this).remove();
		});*/
	});
	
	setTimeout(function() {fading();}, 3000);
}