var xmlhttp;
var objToUpdate;

function loadXMLDoc(url, objDiv) {
    objToUpdate = objDiv;
    if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
        xmlhttp = new XMLHttpRequest();
        xmlhttp.onreadystatechange = stateChange;
        xmlhttp.open("GET", url, true);
        xmlhttp.send(null);
    }
    else {// code for IE6, IE5
        xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
        xmlhttp.onreadystatechange = stateChange;
        xmlhttp.open("GET", url, true);
        xmlhttp.send();
    }

    
}

function stateChange() {
    if (xmlhttp.readyState == 4) {
        if (xmlhttp.status == 200) {
            // process whatever has been sent back here
            document.getElementById(objToUpdate).innerHTML = xmlhttp.responseText;
        }
    }
}