// global flag
var isIE = false;

// global request and XML document objects
var req;
var selval;
var dothis;

// 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 loadXMLDoc(url) {
    // branch for native XMLHttpRequest object
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.onreadystatechange = processReqChange;
        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 = processReqChange;
            req.open("GET", url, true);
            req.send();
        }
    }
}

// handle onreadystatechange event of req object
function processReqChange() {
    // only if req shows "loaded" 	
    if (req.readyState == 4) {
        // only if "OK"
        if (req.status == 200) {
            buildbio();
            
         } else {
            alert("There was a problem retrieving the XML data:\n" +
                req.statusText);
         }
    }
}

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";
    }
}
function buildbio(){
	var bioitems = req.responseXML.getElementsByTagName("bio");
	var namearea = document.getElementById('dudesname');
	var linktext = document.getElementById('spreadthelove');
	var biotext = document.getElementById('gimmesometext');
	namearea.innerHTML = getElementTextNS("", "dudesname", bioitems[0], 0);
	linktext.innerHTML = '<a href="' + getElementTextNS("", "linkage", bioitems[0], 0) + '">View ' + getElementTextNS("", "dudesname", bioitems[0], 0) + '\'s website</a>';
	biotext.innerHTML = getElementTextNS("", "biotext", bioitems[0], 0);
}