var preimg = new Image();
preimg.src = "img/loading.gif";
function alertContents(http_request, handle) {
	var h = document.getElementById(handle);
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			h.innerHTML = http_request.responseText;
		} else {
			alert('Wystąpił błąd przesyłania danych.');
			h.innerHTML = '<P style=\"text-align: center;\">N/A</P>';
		}
	}

}

function ajax(div, addr){
	var http_request = false;
	document.getElementById(div).innerHTML = '<P style=\"text-align: center;\">Czekaj ...<BR><IMG src=\"'+preimg.src+'\" border=\"0\"></P>';
	if (window.XMLHttpRequest) {
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/html; charset=UTF-8');
		}
	} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject('Msxml2.XMLHTTP');
		} catch (e) {
			try {
				http_request = new ActiveXObject('Microsoft.XMLHTTP');
			} catch (e) {}
		}
	}
	if (!http_request) {
		alert('Nie mogę stworzyć instancji obiektu XMLHTTP');
		document.getElementById(div).innerHTML = '<P style=\"text-align: center;\">N/A</P>';
		return false;
	}
	http_request.onreadystatechange = function() { alertContents(http_request, div); };
	http_request.open('GET', addr, true);
	http_request.send(null);

}

function rawajax(addr){
	var http_request = false;
	if (window.XMLHttpRequest) {
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/html; charset=UTF-8');
		}
	} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject('Msxml2.XMLHTTP');
		} catch (e) {
			try {
				http_request = new ActiveXObject('Microsoft.XMLHTTP');
			} catch (e) {}
		}
	}
	if (!http_request) {
		handle = null;
		return false;
	}
	http_request.open('GET', addr, false);
	http_request.send(null);
	if(http_request.status == 200)
		return http_request.responseText;
	return null;
}