// Original JavaScript code by Chirp Internet: www.chirp.com.au
// Please acknowledge use of this code by including this header.

function AjaxRequest() {
    var req;
    var method = "GET";
    var nocache = false;

    this.loadXMLDoc = function(url, params) {
        if (window.XMLHttpRequest) {
            try {
                req = new XMLHttpRequest();
            } catch (e) {
                req = false;
            }
        } else if (window.ActiveXObject) {
            try {
                req = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
                try {
                    req = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e) {
                    req = false;
                }
            }
        }
        if (req) {
            req.onreadystatechange = processReqChange;
            if (nocache) {
                params += (params != '') ? '&' + (new Date()).getTime() : (new Date()).getTime();
            }
            if (method == "POST") {
                req.open("POST", url, true);
                req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                req.send(params);
            } else {
                if (params != '')
                    url += '?' + params;

                req.open(method, url, true);
                req.send(null);
            }
            return true;
        }
        return false;
    }

    this.setMethod = function(newmethod) { method = newmethod.toUpperCase(); }
    this.nocache = function() { nocache = true; }

    // define private methods

    var getNodeValue = function(parent, tagName) {
        var node = parent.getElementsByTagName(tagName)[0];
        return (node && node.firstChild) ? node.firstChild.nodeValue : '';
    }

    // customized for swings
    var processReqChange = function() {
        if (req.readyState == 4 && req.status == 200) {
            var response = req.responseXML.documentElement;
            var slides = response.getElementsByTagName('Slide');

            document.getElementById("slideshow").innerHTML = "";
            for (var i = 0; i < slides.length; i++) {
                document.getElementById("slideshow").innerHTML += "<li>" +
                    "<span>" + getNodeValue(slides[i], 'ImageUrl') + "</span>" +
                    "<p>" + getNodeValue(slides[i], 'Description') + "</p>" +
                    "<a href=\"" + getNodeValue(slides[i], 'NavigateUrl') + "\"></a>" +
                    "</li>";
            }

            slideshow.auto = true;
            slideshow.speed = 5;
            slideshow.link = "linkhover";
            slideshow.info = "information";

            slideshow.scrollSpeed = 4;
            slideshow.spacing = 5;
            slideshow.active = "#fff";
            slideshow.init("slideshow", "image", "imgprev", "imgnext", "imglink");
        }
    }
    
    
    /*
    var processReqChange = function() {
        if (req.readyState == 4 && req.status == 200) {
            var response = req.responseXML.documentElement;
            var commands = response.getElementsByTagName('command');
            for (var i = 0; i < commands.length; i++) {
                method = commands[i].getAttribute('method');
                switch (method) {

                    case 'alert':
                        var message = getNodeValue(commands[i], 'message');
                        window.alert(message);
                        break;

                    case 'setvalue':
                        var target = getNodeValue(commands[i], 'target');
                        var value = getNodeValue(commands[i], 'value');
                        if (target && value != null) {
                            document.getElementById(target).value = value;
                        }
                        break;

                    case 'setdefault':
                        var target = getNodeValue(commands[i], 'target');
                        if (target) {
                            document.getElementById(target).value = document.getElementById(target).defaultValue;
                        }
                        break;

                    case 'focus':
                        var target = getNodeValue(commands[i], 'target');
                        if (target) {
                            document.getElementById(target).focus();
                        }
                        break;

                    case 'setcontent':
                        var target = getNodeValue(commands[i], 'target');
                        var content = getNodeValue(commands[i], 'content');
                        if (target && content != null) {
                            document.getElementById(target).innerHTML = content;
                        }
                        break;

                    case 'setstyle':
                        var target = getNodeValue(commands[i], 'target');
                        var property = getNodeValue(commands[i], 'property');
                        var value = getNodeValue(commands[i], 'value');
                        if (target && property && value) {
                            document.getElementById(target).style[property] = value;
                        }
                        break;

                    case 'setproperty':
                        var target = getNodeValue(commands[i], 'target');
                        var property = getNodeValue(commands[i], 'property');
                        var value = getNodeValue(commands[i], 'value');
                        if (value == "true") value = true;
                        if (value == "false") value = false;
                        if (target) {
                            document.getElementById(target)[property] = value;
                        }
                        break;

                    default:
                        window.console.log("Error: unrecognized method '" + method + "' in processReqChange()");
                }
            }
        }
    }
    */
}