// JavaScript Document
<!--
function loadXMLDoc(url) {

    // branch for native XMLHttpRequest object

    if (window.XMLHttpRequest) {

        req = new XMLHttpRequest();

        req.onreadystatechange = processReqChange;

        req.open("GET", url, true);

        req.send(null);

    // branch for IE/Windows ActiveX version

    } else if (window.ActiveXObject) {

        req = new ActiveXObject("Microsoft.XMLHTTP");

        if (req) {

            req.onreadystatechange = processReqChange;

            req.open("GET", url, true);

            req.send();

        }

    }

}



function processReqChange() {

    // only if req shows "loaded"

    if (req.readyState == 4) {

        // only if "OK"

        if (req.status == 200) {

	   window.status="ok";

        document.getElementById("cambia").innerHTML=req.responseText;

            // ...processing statements go here...

        } else {

            alert("There was a problem retrieving the XML data:\n" +

                req.statusText);

        }

    }

}



function carga(pagina) {

    var nom = pagina.substring(0,pagina.lastIndexOf('.'));;
    var ext = pagina.substring(pagina.lastIndexOf('.')+1,pagina.length);;

	pagina = nom + '.txt';
	
    document.getElementById("cambia").innerHTML="<center><br><br><img src='img/preloading.gif'><br><br></center>";

    setTimeout("loadXMLDoc('"+pagina+"');",10);



}