function toggleosztaly(onload) {
	var allapot="none";
	var lathatosag;
	if (onload) {
		try {
			document.getElementById('osztalyok').style.display;
			if (allapot=="none") {
				document.getElementById('osztaly_button').value="Osztályok listája";
			}
			else {	
				document.getElementById('osztaly_button').value="Lista elrejtése";
			}	
			document.getElementById('osztalyok').style.display=allapot; 
		}
		catch (e) {
			
		}
	}
	else {
		lathatosag=document.getElementById('osztalyok').style.display;
		if (lathatosag=="block") {
			allapot="none";
			document.getElementById('osztaly_button').value="Osztályok listája";
		}
		else {
			allapot="block";	 
			document.getElementById('osztaly_button').value="Lista elrejtése";
		}	
		document.getElementById('osztalyok').style.display=allapot; 
	}
	
}


	var http_req = false;
	
	function mRequest(url) {

		http_req = false;

		if (window.XMLHttpRequest) { // Mozilla, Safari,...1
			http_req = new XMLHttpRequest();
			if (http_req.overrideMimeType) {
				http_req.overrideMimeType('text/xml');
				// See note below about this line
			}
		} else if (window.ActiveXObject) { // IE
			try {
				http_req = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
				try {
					http_req = new ActiveXObject("Microsoft.XMLHTTP");
				} catch (e) {}
			}
		}

		if (!http_req) {
			alert('Giving up :( Cannot create an XMLHTTP instance');
			return false;
		}
		http_req.onreadystatechange = processChange;
		//http_req.open('GET', url, true);
		http_req.open('POST', url, true);
		http_req.send(null);

	}

	function processChange() {
		var mySelect,j;
		if (http_req.readyState == 4) {
			if (http_req.status == 200) {
				eval(http_req.responseText);
			} else {
				alert('There was a problem with the request.');
			}
		}
	}