function avanzar(){
	var_fot+=1;
	veribot();
}

function retroceder(){
	var_fot-=1;
	veribot();
}

var imagen;
function cargando() {
if (imagen.complete) {
document.getElementById('foto').style.opacity="1";
document.getElementById('foto').style.filter="Alpha(Opacity=100)";
if (eval('tipfot'+var_fot)=='v') {
	document.getElementById('foto').width = 172;
	document.getElementById('foto').height = 245;
} else {
	document.getElementById('foto').width = 350;
	document.getElementById('foto').height = 245;
}
} else setTimeout("cargando()", 20);}

function veribot(){

if (var_fot<1) {var_fot=var_cant;}
if (var_fot>var_cant) {var_fot=1;}

document.getElementById('foto').style.display="none";

document.getElementById('foto').src=eval('fot'+var_fot);
imagen = new Image();
imagen.src = eval('fot'+var_fot);
esc_capa('pos',null,var_fot+" | "+var_cant);
esc_capa('tit',null,eval('titfot'+var_fot));
esc_capa('stit',null,eval('stitfot'+var_fot));
document.getElementById('foto').style.display="inline";
pantalleo();
}

var ns4 = (document.layers)? true:false;
var ie4 = (document.all)? true:false;
var IsN6_or_7=(navigator.userAgent.indexOf("Gecko")!=-1);

function esc_capa(id,nestref,text) {
	if (ns4) {
		var lyr = (nestref)? eval('document.'+nestref+'.document.'+id+'.document') : document.layers[id].document
		lyr.open()
		lyr.write(text)
		lyr.close()
	}
	if (ie4) document.all[id].innerHTML = text;
	if (IsN6_or_7) {
			  document.getElementById(id).innerHTML=text;

			}
}

function pantalleo()
{
document.getElementById('foto').style.opacity="0";
document.getElementById('foto').style.filter="Alpha(Opacity=0)";
setTimeout("despantalleo()", 5);
}

function despantalleo()
{
if (imagen.complete) {
document.getElementById('foto').style.opacity="1";
document.getElementById('foto').style.filter="Alpha(Opacity=100)";
if (eval('tipfot'+var_fot)=='v') {
	document.getElementById('foto').width = 172;
	document.getElementById('foto').height = 245;
} else {
	document.getElementById('foto').width = 350;
	document.getElementById('foto').height = 245;
}
} else {
document.getElementById('foto').style.opacity="0.7";
document.getElementById('foto').style.filter="Alpha(Opacity=70)";
cargando();
}
}