function loadXMLDoc(url,code,id) {
    //alert('loadXMLDoc:'+url);
    // branch for native XMLHttpRequest object
    if (window.XMLHttpRequest) {
        var req = new XMLHttpRequest();
        req.onreadystatechange = function (){processReqChange(req,code,id)};
        req.open("GET", url, true);
        req.send(null);
    // branch for IE/Windows ActiveX version
    } else if (window.ActiveXObject) {
        isIE = true;
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.onreadystatechange = function ()
                                     {
                                        processReqChange(req,code,id)
                                     };
            req.open("GET", url, true);
            req.send();
        }
    }
}

// handle onreadystatechange event of req object
function processReqChange(req,code,id) {
    
    // only if req shows "loaded"
    if (req.readyState == 4) {
        //alert('processReqChange status: '+req.status);
        // only if "OK"
        if (req.status == 200) 
        {
        //alert(code);
            switch(code)
            {
                case "helptext":
                    setHelpTekst(req,id);
                break;
                case "facility":
                    setFacilities(req);
                break;
            }
            //.setHelpTekst(req,id);
        } else {
            alert("There was a problem retrieving the XML data:\n" +
                req.statusText);
        }
    }
}

// retrieve text of an XML document element, including
// elements using namespaces
function getElementTextNS(prefix, local, parentElem, index) {
    var result = "";
    if (prefix && isIE) {
        // IE/Windows way of handling namespaces
        result = parentElem.getElementsByTagName(prefix + ":" + local)[index];
    } else {
        // the namespace versions of this method 
        // (getElementsByTagNameNS()) operate
        // differently in Safari and Mozilla, but both
        // return value with just local name, provided 
        // there aren't conflicts with non-namespace element
        // names
        result = parentElem.getElementsByTagName(local)[index];
    }
    if (result) {
        // get text, accounting for possible
        // whitespace (carriage return) text nodes 
        if (result.childNodes.length > 1) {
            return result.childNodes[1].nodeValue;
        } else {
            return result.firstChild.nodeValue;    		
        }
    } else {
        return "n/a";
    }
}