var segundos = 5;

function backFt(){
        
        clearInterval(intX);
        i = cont;
        if(document.getElementById("multi"+i).style.display == "block"){
                document.getElementById("multi"+i).style.display = "none";
                document.getElementById(('botao'+i)).className = "";
                
                if(i > 1){
                        cont--;
                        document.getElementById("multi"+cont).style.display="block";
                        document.getElementById(('botao'+cont)).className = "ativo";
                }else{
                        document.getElementById("multi"+fim).style.display="block";
                        document.getElementById(('botao'+fim)).className = "ativo";
                        cont = fim;
                }
        }
        
        if (controla == 0)
        {
                div = "multi";
                intX = setInterval("troca(div,cont++,fim)", segundos * 1000);
        }
}

function nextFt(){
        
        clearInterval(intX);
        i = cont;
        if(document.getElementById("multi"+i).style.display == "block"){
                document.getElementById("multi"+i).style.display = "none";
                document.getElementById(('botao'+i)).className = "";
                
                if(i < fim){
                        cont++;
                        document.getElementById("multi"+cont).style.display="block";
                        document.getElementById(('botao'+cont)).className = "ativo";
                }else{
                        document.getElementById("multi1").style.display="block";
                        document.getElementById(('botao1')).className = "ativo";
                        cont = 1;
                }
        }
        
        if (controla == 0)
        {
                div = "multi";
                intX = setInterval("troca(div,cont++,fim)", segundos * 1000);
        }
}

javiu = 0;

function troca(i,eofim,pub){
        clearInterval(intX);
        cont = i;

        for (j=1;j<=eofim;j++)
        {
                document.getElementById('multi'+j).style.display = "none";
                document.getElementById('botao'+j).className="";
        }   

		if (pub == 1)
		{
			  document.getElementById('multi_pub').style.display="none";
			  document.getElementById('menuslideshow').style.display="block";
		}

		if (i == 2 && pub == 1 && javiu == 0)
		{
			  javiu = 1;
			  cont = 1;
			  document.getElementById('multi_pub').style.display="block";
			  document.getElementById('menuslideshow').style.display="none";
		} 
		else if(i <= eofim && i > 0)
		{
				aux = eval(i);
				document.getElementById('multi'+aux).style.display="block";
				document.getElementById('botao'+aux).className="ativo";
		}
		else if(i == 0)
		{
				cont = eofim;
				t = cont;
				document.getElementById('multi'+t).style.display="block";
				document.getElementById('botao'+t).className="ativo";
		}
		else
		{
				cont = 1;
				t = cont;
				javiu = 0;		
		
				document.getElementById('multi'+t).style.display="block";
				document.getElementById('botao'+t).className="ativo";
		}

        intX = setInterval("troca(++cont,"+eofim+","+pub+")", segundos * 1000);
}