var req;
var requester;

function AjaxRequest(request_url) {
  //requester = requester_id;
  loadXMLDoc(request_url);
}
function loadXMLDoc(url) {
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.onreadystatechange = processReqChange;
        req.open("GET", url, true);
        req.send(null);
    } else if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.onreadystatechange = processReqChange;
            req.open("GET", url, true);
            req.send();
        }
    }
}
function processReqChange() {
    ab = window.setTimeout("req.abort();", 15000);
    if (req.readyState == 4) {
        clearTimeout(ab);
        // only if "OK"
        if (req.status == 200) {
          //document.getElementById(requester).innerHTML=req.responseText;
        } else {
        }
    }  

}