function CFeedMate()
{
}

CFeedMate.prototype.CAjax = function()
{
    var method  = 'GET';
    var params  = new Object();
    var headers = new Object();
    
    this.load = function(url, readyStateAction)
    {
        var xmlHttp = new XMLHttpRequest();
        xmlHttp.open(method, url);
        
        // generate POST parameters querystring
        if (method == 'POST') {
            var queryString = '';
            for (var i in params) {
                queryString += encodeURIComponent(i) + '=' + encodeURIComponent(params[i]) + '&';
            }
            if (queryString == '') {
                queryString = null;
            }
        }
        
        // send headers
        for (var i in headers) {
            xmlHttp.setRequestHeader(i, headers[i]);
        }
        
        if (method == 'POST') {
            xmlHttp.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
        }
        
        var reqObj = new this.CRequest();
        reqObj.setReadyStateAction(readyStateAction);
        reqObj.setQueryString(queryString);
        reqObj.doRequest(xmlHttp);
    }
    
    this.setMethod = function(m)
    {
        method = m.toUpperCase();
        if (method != 'POST' && method  != 'GET') {
            method = 'GET';
        }
    }
    
    this.setParam = function(name, value)
    {
        params[name] = value;
    }
    
    this.setHeader = function(name, value)
    {
        headers[name] = value;
    }
}


CFeedMate.prototype.CAjax.prototype.CRequest = function()
{
    var reqObj            = null;
    var queryString       = null;
    var readyStateAction  = null;
    var requestDone       = false;
    
    
    this.doRequest = function(obj)
    {
        reqObj                    = obj;
        reqObj.onreadystatechange = this.performReadyStateAction;
        reqObj.sender             = this;
        reqObj.send(queryString);
    }
    
    this.setQueryString = function(string)
    {
        queryString = string;
    }
    
    this.setReadyStateAction = function(action)
    {
        readyStateAction = action;
    }
    
    /**
     * NOTE: here 'this' is not in context of this object, it's in
     * context of the XMLHttpRequest object!
     * this.sender contains the actually object.
    */
    this.performReadyStateAction = function()
    {
        if (this.readyState == 4) {
            this.sender.afterRequest();
        }
    }
    
    this.afterRequest = function()
    {
        requestDone = true;
        this.readyStateAction = readyStateAction;
        this.readyStateAction();
    }
    
    this.getStatus = function()
    {
        if (requestDone) {
            return reqObj.status;
        }
        return false;
    }
    
    this.getResponseText = function()
    {
        if (requestDone) {
            return reqObj.responseText;
        }
        return false;
    }
    
    this.getResponseXML = function()
    {
        if (requestDone) {
            return reqObj.responseXML;
        }
        return false;
    }
}


// ---

window.onload = function()
{
    var FeedMate = new CFeedMate();
    var req = new FeedMate.CAjax();
    req.setMethod('post');
    req.setParam('test', 'abc');
    req.load('test.php', function()
    {
        alert(
            'Status: ' + this.getStatus() + '\n' +
            'ResponseText: ' + this.getResponseText()
        );
    });
}