var t;
var tt;
var cont = 0;

var arrayFotos = new Array();
arrayFotos[0] = "<a href='#'><img src='../imagens/fotosInicio/cataratas1.jpg'></a>";
arrayFotos[1] = "<a href='#'><img src='../imagens/fotosInicio/cataratas2.jpg'></a>";
arrayFotos[2] = "<a href='#'><img src='../imagens/fotosInicio/passeio_poco.jpg'></a>";
arrayFotos[3] = "<a href='#'><img src='../imagens/fotosInicio/itaipu1.jpg'></a>";
arrayFotos[4] = "<a href='#'><img src='../imagens/fotosInicio/itaipu2.jpg'></a>";
arrayFotos[5] = "<a href='#'><img src='../imagens/fotosInicio/foz.jpg'></a>";



function fadeOut()
{
	document.getElementById('fotosHome').style.alpha = 1;
	document.getElementById('fotosHome').style.filter = 100;
	
	t = setInterval("diminuiAlpha(document.getElementById('fotosHome'))","100");

}

function fadeIn()
{

	
	tt = setInterval("aumentaAlpha(document.getElementById('fotosHome'))","100");
	cont++;
	if(cont >= 6)
	{
		cont = 0;
		document.getElementById('fotosHome').innerHTML = arrayFotos[cont];
		
	}
	else
		document.getElementById('fotosHome').innerHTML = arrayFotos[cont];
}

function diminuiAlpha(div)
{

	var alpha = document.getElementById('fotosHome').style.alpha;	
	
	if(alpha <= 0.1)
	{
		clearInterval(t);
		fadeIn();

	}
	else
	{
				
		document.getElementById('fotosHome').style.filter = "alpha(opacity="+ alpha*100 +")";
		document.getElementById('fotosHome').style.alpha = alpha - 0.06;
	}
		
		
		
}

function aumentaAlpha(div)
{
	
	var alpha = document.getElementById('fotosHome').style.alpha;
	
	if(alpha >= 1.3)
	{			
		clearInterval(tt);
		fadeOut();
	}
	else
	{
		
		document.getElementById('fotosHome').style.filter = "alpha(opacity="+ alpha*100 +")";
		document.getElementById('fotosHome').style.alpha = alpha + 0.06;
	}
}