var req3;
function verFotos(pagFoto) {
        var url3 = "php/fotos.php?pagFoto="+pagFoto;
        if(window.XMLHttpRequest) {
                req3 = new XMLHttpRequest();
        } else if(window.ActiveXObject) {
                req3 = new ActiveXObject("Microsoft.XMLHTTP");
        }
        req3.open("GET", url3, true);
        req3.onreadystatechange = callback3;
        req3.send(null);
}
function callback3() {        
        obj = document.getElementById("fotos");
        setFade3(0);
		if(req3.readyState == 4) {
                if(req3.status == 200) {
                        response = req3.responseText;
                        obj.innerHTML = response;
                        fade3(0);
                } else {
                        alert("Hubo un problema al intentar recuperar los datos del servidor\n" + req3.statusText);
                }
        }
}
function fade3(amt) {
	if(amt <= 100) {
		setFade3(amt);
		amt += 10;
		setTimeout("fade3("+amt+")", 5);
    }
}
function setFade3(amt) {
	obj = document.getElementById("fotos");
	amt = (amt == 100)?99.999:amt;
	// IE
	obj.style.filter = "alpha(opacity:"+amt+")";
	// Safari<1.2, Konqueror
	obj.style.KHTMLOpacity = amt/100;
	// Mozilla and Firefox
	obj.style.MozOpacity = amt/100;
	// Safari 1.2, newer Firefox and Mozilla, CSS3
	obj.style.opacity = amt/100;
}