function getXMLHttpRequest() {
var request = false;
try {
request = new XMLHttpRequest();
} catch(err1) {
try {
request = new ActiveXObject('Msxml2.XMLHTTP');
} catch(err2) {
try {
request = new ActiveXObject('Microsoft.XMLHTTP');
} catch(err3) {
request = false;
}
}
}
return request;
}

var r;
r = getXMLHttpRequest();

var e;
function odbierzDane()
{
if (r.readyState == 4) {
if (r.status == 200 || r.status == 304) {
e.innerHTML = r.responseText; 
}
}
}

function wymienTresc(adresurl, htmlid, hiperlacze)
{
if (r = getXMLHttpRequest()) {
e = document.getElementById(htmlid);
r.open('GET', adresurl);
r.onreadystatechange = odbierzDane;
r.send(null);
hiperlacze.href = '#';
}
}