Delegate = function(obj,handler) {
	var args = [];
	for(var n = 2; n < arguments.length;n++) args.push(arguments[n]);
	if(args.length > 0) { return function() { return handler.apply(obj,args); } } 
	else { return function() { return handler.apply(obj,arguments); } }
}

function sendRequest(url,callback,postData) {
	var req = createXMLHTTPObject();
	if (!req) return;
	var method = (postData) ? "POST" : "GET";
	req.open(method,url,true);
	req.setRequestHeader('User-Agent','XMLHTTP/1.0');
	if (postData)
		req.setRequestHeader('Content-type','application/x-www-form-urlencoded');
	req.onreadystatechange = function () {
		if (req.readyState != 4) return;
		if (req.status != 200 && req.status != 304) {
			// alert('HTTP error ' + req.status);
			return;
		}
		callback(req);
	}
	if (req.readyState == 4) return;
	req.send(postData);
}

var XMLHttpFactories = [
	function () {return new XMLHttpRequest()},
	function () {return new ActiveXObject("Msxml2.XMLHTTP")},
	function () {return new ActiveXObject("Msxml3.XMLHTTP")},
	function () {return new ActiveXObject("Microsoft.XMLHTTP")}
];

function createXMLHTTPObject() {
	var xmlhttp = false;
	for (var i=0;i<XMLHttpFactories.length;i++) {
		try { xmlhttp = XMLHttpFactories[i]();}
		catch (e) {	continue; }
		break;
	}
	return xmlhttp;
}

contentRotator = function(target,url,looptime,loops) {
	// mandatory arguments
	this._target = (typeof target == 'object') ? target : document.getElementById(target);
	this._url = url;
	// optional arguments
	this._looptime = (typeof looptime == 'number') ? (looptime*1000) : 20000;
	this._loops = (typeof loops == 'number') ? loops : 0;
	// initialize application
	this.looped = 0;
	this.timeout = setTimeout(Delegate(this,this.handle),this._looptime);
}

contentRotator.prototype.handle = function() {
	this.timeout = null;
	this.looped += 1;
	// get
	sendRequest(this._url,Delegate(this,this.stuffTarget),"POST")
	// recursive
	if(this.looped < this._loops || this._loops == 0) {
		this.timeout = setTimeout(Delegate(this,this.handle),this._looptime);
	}
}
contentRotator.prototype.stuffTarget = function(xmlhttpObj) {
	this._target.innerHTML = xmlhttpObj.responseText;
}