function dumpObject(obj){
    var output = '';
    for (i in obj){
      output = output + i+':'+obj[i]+"\n";
    }
    return output;
}

// global flag
var isIE = /*@cc_on!@*/false,
    XHR = (function()
    {
        if (window.XMLHttpRequest) {
            return XMLHttpRequest;
        }
        else if (window.ActiveXObject) {
            try {
                return ActiveXObject("Microsoft.XMLHTTP");
            }
            catch(e) {
                try {
                    return ActiveXObject("Msxml2.XMLHTTP");
                }
                catch(e) {
                    return false;
                }
            }
        }
    }()),
    request = new XHR(),
    zip = request;

// retrieve XML document (reusable generic function);
// parameter is URL string (relative or complete) to
// an .xml file whose Content-Type is a valid XML
// type, such as text/xml; XML source must be from
// same domain as HTML file
function loadZipDoc(url) {
    request.onreadystatechange = processReqChange;
    request.open("GET", url, true);
    request.send(null);
}

// handle onreadystatechange event of request object
function processReqChange() {
    // only if request shows "loaded"
    if (this.readyState == 4) {
        // only if "OK"
        if (this.status == 200) {
            var city  = zip.responseXML.getElementsByTagName('city')[0].firstChild,
                state = zip.responseXML.getElementsByTagName('state')[0].firstChild;

            if (city && state){
                processZip(city.nodeValue, state.nodeValue);
            } 
            else {
                return;    
            }

         } else {
            //silently ignore any errors
            //alert("There was a problem retrieving the XML data:\n" + this.statusText);
         }
    } 
}

// invoked by "Category" select element change;
// loads chosen XML document, clears Topics select
// element, loads new items into Topics select element
function loadDoc(evt) {

    if (document.getElementById("country").value != "United States") {
        return;
    }

    // equalize W3C/IE event models to get event object
    evt = evt || window.event;
    if (evt) {
        // equalize W3C/IE models to get event target reference
        var elem = evt.target || evt.srcElement;
        if (elem) {
            try {
                if (elem.value != '') {
                    //Load from specific URL
                    loadZipDoc('/xmljs/flprocess_zip.asp?zip='+elem.value);
                }       
            }
            catch(e) {
                var msg = (typeof e == "string") ? e : ((e.message) ? e.message : "Unknown Error");
//                alert("Unable to get XML data:\n" + msg);
                return;
            }
        }
    }
}

function processZip(city, state) {
    document.getElementById('city').value = city;
    var stateobj = document.getElementById('state');
    for (i=0; i<stateobj.options.length; i++) {
        if (stateobj.options[i].value == state) {
            stateobj.options[i].selected = true;
            break;
        }
    }
    // Call the change handler on the state object if there is one.
    try { 
        stateobj.onchange();
    } 
    catch(e) {
    }

}