function jah(url,target) {
// native XMLHttpRequest object
document.getElementById(target).innerHTML = 
'<p class="initio">Retrieving information ...</p>';
if (window.XMLHttpRequest) {
req = new XMLHttpRequest();
req.onreadystatechange = function() {jahDone(target);};
req.open("GET", url, true);
req.send(null);
// IE/Windows ActiveX version
} else if (window.ActiveXObject) {
req = new ActiveXObject("Microsoft.XMLHTTP");
if (req) {
req.onreadystatechange = function() {jahDone(target);};
req.open("GET", url, true);
req.send();
}
}
}    

function jahDone(target) {
// only if req is "loaded"
if (req.readyState == 4) {
// only if "OK"
if (req.status == 200) {
results = req.responseText;
document.getElementById(target).innerHTML = results;
} else {
document.getElementById(target).innerHTML=
"<p class='aviso'>Apologies, there was an error.</p>\n<span class='initio'>" +
req.statusText + "</span>";
}
}
}