//Start phpRequest Object
function AjaxRequest(serverUrl, ID)
{

  //Set some default variables
    this.parms = new Array();
    this.parmsIndex = 0;

  //Set the server url
    this.server = serverUrl;
    this.requestMethod = 'GET';

    this.id = ID;
    this.handler = null;
    this.httpRequest = null;
    this.resultXML = null;
    var currentObject = this;

    this.execute = function ()
    {
        //Try to create our XMLHttpRequest Object
        try
        {
            this.httpRequest = this.createXMLHttp();
            var httpRequest = this.httpRequest;
        }
        catch (e)
        {
            alert('Error creating the connection!');
            return;
        }

        //Make the connection and send our data
        try
        {
            var txt = "?1";
            for(var i in this.parms)
            {
              txt = txt + '&'+this.parms[i].name + '=' + this.parms[i].value;
            }

            if (this.requestMethod == 'GET')
            {
                httpRequest.open("GET", this.server + txt, true);
                httpRequest.setRequestHeader('content-type', 'text/xml');
                httpRequest.onreadystatechange = this.AJAXRequest_onReadyStateChange;
                httpRequest.send('');
            }
            else
            {
                httpRequest.open("POST", this.server, true);
                httpRequest.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
                httpRequest.onreadystatechange = this.AJAXRequest_onReadyStateChange;
                httpRequest.send(txt);
            }

            // alert(this.server + txt);

        }
        catch (e)
        {
            alert('An error has occured calling the external site: ' + e);
            return false;
        }

    }

    // --- AJAX onreadystatechange handler --- //
        this.AJAXRequest_onReadyStateChange = function ()
        {
            if (httpRequest.readyState != 4) return;

            if (httpRequest.status == 200)
            { 
                
                resultXML = httpRequest.responseText;
                
                // --- Load current handler--- //
                currentObject.resultXML = resultXML ;
                if (typeof(handler) == 'function') handler(currentObject);

                // alert(resultXML.getElementsByTagName('control')[0].firstChild.data);
                return resultXML;
            }
            else
            {
                alert('The server respond with a bad status code: ' + httpRequest.status);
                return false;
            }
        }
    // --- AJAX onreadystatechange handler --- //

    this.setHandler = function (handlerName)
    {
        handler = handlerName;
    }

    this.setRequestMethod = function (methodName)
    {
        if (methodName == 'POST')
        {
            this.requestMethod = 'POST';
        }
        else
        {
            this.requestMethod = 'GET';
        }
    }

    this.add = function (name, value)
    {
      //Add a new pair object to the params
      this.parms[this.parmsIndex] = new pair(name,value);
      this.parmsIndex++;
    }

    this.createXMLHttp = function ()
    {
        // var httpRequest = null;
        try
        {
            httpRequest = new ActiveXObject('Msxml2.XMLHTTP');
        }
        catch (e)
        {
            try
            {
                httpRequest = new ActiveXObject('Microsoft.XMLHTTP');
            }
            catch (ee)
            {
                httpRequest = null;
            }
        }

        if (!httpRequest && typeof XMLHttpRequest != 'undefined')
        {
            httpRequest = new XMLHttpRequest();
        }

        return httpRequest;
    }

}


//Utility pair class
function pair(name, value)
{
  this.name = name;
  this.value = value;
}