// JavaScript Document

var global_r;

function Rotator(a) {
	
	global_r = this; 
	
	this.http = createXMLHTTPObject();
	var r = new Date();
	this.getUrl = "/lib/rotater.php";
	this.tickTime = 4000;
	
	this.callBack = 
	
	this.getImage = function() {
			sendRequest(this.http, this.getUrl, function(req) {
			var res = eval(req.responseText);
			var l = document.getElementById(a);
			var i = l.firstChild;
			var image = new Image();
			image.src = res.image;
			l.href = res.path;
			l.title = res.description;
			i.src = image.src;
			setTimeout("global_r.getImage()", global_r.tickTime);
		}, null);
	};
	
	this.start = function() {
		this.getImage();
	};

};





// Ajax
function sendRequest(req, 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;
}