function createXHR() {
		var request = false;
		try {
			request = new ActiveXObject('Msxml2.XMLHTTP');
		}
		catch (err2) {
			try {
				request = new ActiveXObject('Microsoft.XMLHTTP');
			}
			catch (err3) {
				try {
					request = new XMLHttpRequest();
				}
				catch (err1) {
					request = false;
				}
			}
		}
		return request;
}

function getCalendar(url, qs) {
	var http_request = false;
	var request = qs;

	http_request = createXHR();
	http_request.onreadystatechange = function() { makeCalendar(http_request); };
	http_request.open('POST', url, true);
	http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	//http_request.setRequestHeader('Content-Type', 'text/html; charset=windows-1250');
	http_request.send(request);
}

function makeCalendar(http_request) {
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			//alert(http_request.responseText);
			document.getElementById('kalendarAkciBody').innerHTML = http_request.responseText;
		} else {
			alert('Chyba');
		}
	}
}