function getXmlHttpRequestObject(){
    if (window.XMLHttpRequest) {
        return new XMLHttpRequest();
    }
    else 
        if (window.ActiveXObject) {
            return new ActiveXObject("Microsoft.XMLHTTP");
        }
        else {
            alert("Your browser doesn't support the XmlHttpRequest object. Better upgrade to Firefox.");
        }
}

function GetAjax(sUrl, sDiv){
var receiveReq = getXmlHttpRequestObject();
    if (receiveReq.readyState == 4 || receiveReq.readyState == 0) {
        receiveReq.open("GET", sUrl, true);
        receiveReq.onreadystatechange = function handleSayHello(){
            if (receiveReq.readyState == 4) {
                document.getElementById(sDiv).innerHTML = receiveReq.responseText;
            }
        };
        receiveReq.send(null);
    }
}