var ContaFoto
var ImmaginePrecaricata = new Image()
var SlideShow

function Lampeggia(ObjID)
{
	window.setInterval('Visibile('+ObjID+')',500)
}

function Visibile(ObjID)
{
	if(ObjID.style.visibility=='visible')
	{
		ObjID.style.visibility='hidden'
	}
	else
	{
		ObjID.style.visibility='visible'
	}
	
}

function CambiaFoto(ObjID,NomeAlbum,NumFoto)
{	
	window.clearTimeout(SlideShow)
	ContaFoto=1
	image = document.getElementById(ObjID)
	setOpacity(image, 0);
	document.getElementById(ObjID).src='Foto/'+NomeAlbum+ContaFoto+'.jpg'
	image.style.visibility = "visible"
	Compari(ObjID,0,NomeAlbum,NumFoto)
}

function Compari(ObjID,opacity,NomeAlbum,NumFoto)
{
	Object = document.getElementById(ObjID)
	
	if (opacity <= 100) 
	{
		setOpacity(Object, opacity);
		opacity += 10
		SlideShow = window.setTimeout("Compari('"+ObjID+"',"+opacity+",'"+NomeAlbum+"',"+NumFoto+")", 100)
	}
	else
	{
		SlideShow = window.setTimeout("Scompari('"+ObjID+"',"+opacity+",'"+NomeAlbum+"',"+NumFoto+")", 3000)
		
		NumImmaginePrecaricata=ContaFoto+1
		ImmaginePrecaricata.src='Foto/'+NomeAlbum+NumImmaginePrecaricata+'.jpg'
	}
}
function Scompari(ObjID,opacity,NomeAlbum,NumFoto) 
{
	Object = document.getElementById(ObjID)
	
	if (opacity >=0) 
	{
		setOpacity(Object, opacity)
		opacity -= 10
		SlideShow = window.setTimeout("Scompari('"+ObjID+"',"+opacity+",'"+NomeAlbum+"',"+NumFoto+")", 100)
	}
	else if(ContaFoto<NumFoto)
	{
		ContaFoto += 1
		Object.src=ImmaginePrecaricata.src
		
		SlideShow = Compari(Object.id,0,NomeAlbum,NumFoto)
	}
}

function setOpacity(obj, opacity) 
{
	obj.style.filter = "alpha(opacity:"+opacity+")"
	obj.style.opacity = opacity/100
}