var aXmlIds = ["MSXML2.XMLHTTP.5.0", "MSXML2.XMLHTTP.4.0", "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP", "MICROSOFT.XMLHTTP.1.0", "MICROSOFT.XMLHTTP.1", "MICROSOFT.XMLHTTP"];
function XMLClient(sUrl, bdoAsync)
{
    this.sUrl = sUrl;
    this.oHandler = null;
    this.oXMLRequest = null;
    this.sParams = '';
    if (bdoAsync)
        this.bdoAsync = bdoAsync;
    else
        this.bdoAsync = true;
	    this.sClosureNode = "";
}
XMLClient.prototype.query = function(oHandler)
{
    this.oHandler = oHandler;
    if (window.XMLHttpRequest)
    {
        if (!this.oXMLRequest) this.oXMLRequest = new XMLHttpRequest();
    }
    else if (window.ActiveXObject)
    {
        for (var i = 0; i < aXmlIds.length; i++)
        {
            try {
                this.oXMLRequest = new ActiveXObject(aXmlIds[i]);
                break;
            } catch(e) { }
        }
    }
    else
    {
        if (!this.oIframe)
        {
            var oIframe = document.createElement("IFRAME");
            oIframe.setAttribute("id", "xmlhttpFrame");
            oIframe.setAttribute("name", "xmlhttpFrame");
            oIframe.style.visibility = "hidden";
            oIframe.style.position = "absolute"
            oIframe.style.top = "0px";
            oIframe.style.left = "0px";
            document.body.appendChild(oIframe);
            this.oIframe = document.getElementById("xmlhttpFrame");
        }

        this.oIframe.setAttribute("src", this.sUrl + "?" + this.sParams);
        window.clearInterval(this.iTimeout);
        this.bJustCalled = true;
        var oSelf = this;
        this.iTimeout = window.setInterval(function() {oSelf.processReqChange(oSelf);}, 500);
    }
    if (this.oXMLRequest)
    {
        var oSelf = this;
        if(this.bdoAsync){ this.oXMLRequest.onreadystatechange = function () {oSelf.processReqChange()}; }
        this.oXMLRequest.open("POST", this.sUrl, this.bdoAsync);
        this.oXMLRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		try {
			this.oXMLRequest.send(this.sParams);
		}
		catch(e){}
        if (!this.bdoAsync) return this.oXMLRequest.responseText;   
    }
}
XMLClient.prototype.setAsync = function (bdoAsync)
{
    this.bdoAsync = bdoAsync;
}
XMLClient.prototype.setClosureNode = function(sNodeName)
{
    this.sClosureNode = sNodeName;
}
XMLClient.prototype.processIFrame = function()
{
    var oLoadedData = null;
    if (document.frames["xmlhttpFrame"] != null)
    {
        var sDoc = document.frames["xmlhttpFrame"].document.body.innerHTML;
        if ((sDoc.indexOf("/" + this.sClosureNode) != -1) || (sDoc.indexOf(this.sClosureNode + "/") != -1))
        {
            oLoadedData = document.frames["xmlhttpFrame"].document;
            this.iReadyState = 4;
            window.clearInterval(this.iTimeout);
        }
        return oLoadedData;
    }
}
XMLClient.prototype.processReqChange = function ()
{
    if (this.oIframe != null)
    {
        if (this.bJustCalled)
        {
            this.bJustCalled = false;
            this.iReadyState = 1;
        } else {
            oLoadedData = this.processIFrame();
            if (oLoadedData == null)
            {
                return;
            }
        }
    }
    if (this.oXMLRequest != null)
    {
        this.iReadyState = this.oXMLRequest.readyState;
    }
    switch (this.iReadyState)
    {
        case 1:
            this.oHandler.onInit();
            break;
        case 2:
            if (window.XMLHttpRequest)
            {
			    try{
                if (this.oXMLRequest.status != 200)
                {
                    this.oHandler.onError(this.oXMLRequest.status, this.oXMLRequest.statusText);
                    this.oXMLRequest.abort();
                }
				}catch(ex){}
            } else if (this.oIframe != null) {
                this.oHandler.onError(-1, oLoadedData);
            }
            break;
        case 3:
            var contentLength = 0;
			try{
            if (window.XMLHttpRequest)
            {
                try { contentLength = this.oXMLRequest.getResponseHeader("Content-Length"); }
                catch(ex) { }
                if (this.oIframe != null)
                { this.oHandler.onProgress(oLoadedData.length); }
                this.oHandler.onProgress(this.oXMLRequest.responseText.length);
            }
			}catch(ex){}
            break;
        case 4:
            if (this.oIframe != null)
            { this.oHandler.onLoad(oLoadedData); } 
            else { this.oHandler.onLoad(this.oXMLRequest.responseText); }
            break;
    }
    return;
}
XMLClient.prototype.addParam = function (paramName, paramValue)
{
    if (this.sParams.length > 0)
    {    this.sParams = this.sParams + "&"; }
    this.sParams= this.sParams + paramName + "=" + escape(paramValue);
}
XMLClient.prototype.clearParameters = function ()
{
    this.sParams = "";
}
XMLClient.prototype.getReadyState = function ()
{
        return this.iReadyState;
}
XMLClient.prototype.abort = function ()
{
    try {
        if (this.oXMLRequest) { this.oXMLRequest.abort(); }
        else { this.oIframe.setAttribute("src", ""); }
    }
    catch(e){}
}
function XMLHandler (){}
XMLHandler.onInit = function (){}
XMLHandler.onError = function (status, statusText){}
XMLHandler.onProgress = function (dataLength){}
XMLHandler.onLoad = function (responseText){}
function XMLParser ()
{
    try { this.parser = new DOMParser(); }
    catch (e) { this.parser = new ActiveXObject('Microsoft.XMLDOM'); }
}
XMLParser.prototype.parseString = function (xmlText)
{
    try { XMLDocument = this.parser.parseFromString(xmlText, "text/xml"); }
    catch (e) {
        this.parser.async = 'false';
        this.parser.loadXML(xmlText);
        XMLDocument = this.parser;
    }
    return XMLDocument;
}