var curpage = 1;
var numpages = 3;
var timer=null;
var stopped = false;

//document.getElementById('bt'+curpage).className = 'active';

function fnc_step(nro) 
{
	if (curpage == 0 || curpage>numpages)
	{curpage=1;}

	var obj=document.getElementById('rota'+curpage);

	obj.style.visibility = "hidden";
	obj.style.display = "none";
	document.getElementById('bt'+curpage).className = '';

	curpage = nro;

	var obj=document.getElementById('rota'+curpage);
	obj.style.visibility = "visible";
	obj.style.display = "";
        document.getElementById('bt'+curpage).className = 'blin-activado';
	

}