var req1;
function verVideos(numVideo) {
        var url1 = "php/videos.php?numVideo="+numVideo;
        if(window.XMLHttpRequest) {
                req1 = new XMLHttpRequest();
        } else if(window.ActiveXObject) {
                req1 = new ActiveXObject("Microsoft.XMLHTTP");
        }
        req1.open("GET", url1, true);
        req1.onreadystatechange = callback1;
        req1.send(null);
}
function callback1() {        
        obj = document.getElementById("videos");
        setFade1(0);
		if(req1.readyState == 4) {
                if(req1.status == 200) {
                        response = req1.responseText;
                        obj.innerHTML = response;
                        fade1(0);
                } else {
                        alert("Hubo un problema al intentar recuperar los datos del servidor\n" + req1.statusText);
                }
        }
}
function fade1(amt1) {
	if(amt1 <= 100) {
		setFade1(amt1);
		amt1 += 10;
		setTimeout("fade1("+amt1+")", 5);
    }
}
function setFade1(amt1) {
	obj = document.getElementById("videos");
	amt1 = (amt1 == 100)?99.999:amt1;
	// IE
	obj.style.filter = "alpha(opacity:"+amt1+")";
	// Safari<1.2, Konqueror
	obj.style.KHTMLOpacity = amt1/100;
	// Mozilla and Firefox
	obj.style.MozOpacity = amt1/100;
	// Safari 1.2, newer Firefox and Mozilla, CSS3
	obj.style.opacity = amt1/100;
}