function isDefined(obj) {
	return (typeof(obj) != "undefined");
}

function JSRequest() {
	var ivIsSupported = true;
	var ivUA = null;
	
	this.openURL = openURL;
	this.openXMLURL = openXMLURL;
	this.openPOSTURL = openPOSTURL;
	this.initialize = initialize;
	this.isActive = isActive;
	
	function initialize() {
	}
	
	function _init() {
		if (!ivIsSupported || ivUA != null)
			return;
		with (document) {
			try {
				if (window.XMLHttpRequest)
					ivUA = new XMLHttpRequest();
				else
					ivUA = new ActiveXObject("Microsoft.XMLHTTP");
				
				ivIsSupported = isDefined(ivUA.readyState);
			} catch (ex) {
				ivIsSupported = false;
			}
		}
	}
	
	function isActive() {
		if (ivIsSupported && ivUA == null)
			_init();
		return ivIsSupported && ivUA != null;
	}
	
	function openURL(url) {
		if (ivIsSupported && ivUA == null)
			_init();
		if (!ivIsSupported || ivUA == null)
			return null;
		var absUrl = 'http://www.faredanza.it/' + url;
		myRand = parseInt(Math.random() * 99999999);
		ivUA.open("GET", absUrl + "&myRand=" + myRand, false);
		ivUA.send(null);
		return ivUA.responseText;
	}
	
	function openXMLURL(url) {
		if (ivIsSupported && ivUA == null)
			_init();
		if (!ivIsSupported || ivUA == null)
			return null;
		var absUrl = 'http://www.faredanza.it/' + url;
		myRand = parseInt(Math.random() * 99999999);
		ivUA.open("GET", absUrl + "&myRand=" + myRand, false);
		ivUA.send(null);
		return ivUA.responseXML;
	}
	
	function openPOSTURL(url,params) {
		if (ivIsSupported && ivUA == null)
			_init();
		if (!ivIsSupported || ivUA == null)
			return null;
		var absUrl = 'http://www.faredanza.it/' + url;
		ivUA.open("POST", absUrl, false);
		ivUA.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		ivUA.setRequestHeader("Content-length", params.length);
		ivUA.setRequestHeader("Connection", "close");
		ivUA.send(params);
		return ivUA.responseText;
	}
}

function loadXMLFile(xml) {
	if (window.ActiveXObject) {
		var xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
		xmlDoc.async = false;
		xmlDoc.load('http://www.faredanza.it/' + xml);
		return xmlDoc.documentElement;
	} else if (document.implementation && document.implementation.createDocument) {
		var xmlDoc = document.implementation.createDocument("","",null);
		xmlDoc.async = false;
		xmlDoc.load('http://www.faredanza.it/' + xml);
		return xmlDoc;
	}
}