function onlyNumbers(mibe) {
  x=mibe.value
  ki=""
  for(i=0;i<x.length;i++) {
    if (x.substr(i,1)>='0' && x.substr(i,1)<='9') {
      ki+=x.substr(i,1)
    }
  }
  if ((x.length == 1) && (x == 0)) {
	ki = 1;
  }
  mibe.value=ki
}
function VieW(id) {
	var e = document.getElementById(id);
	e.style.display = e.style.display == "none" ? "" : "none";
}
var xmlhttp=null;
function osszeg(id, alap, plusz, user) {
	var ar = (alap*1)+(plusz*1);
	document.getElementById("vegosszeg").innerHTML = "Fizetend&#337;: " + ar + " Ft";
	if (id == 1) {
		document.getElementById('hsz').style.display = "none";
		document.getElementById("hsz").innerHTML = "";
	} else if (id == 2) {
		document.getElementById('hsz').style.display = "none";
		document.getElementById("hsz").innerHTML = "";
	} else if (id == 3) {
		if (window.XMLHttpRequest) {
			// code for IE7+, Firefox, Chrome, Opera, Safari
			xmlhttp = new XMLHttpRequest();
		} else if (window.ActiveXObject) {
			// code for IE6, IE5
			xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		} else {
			alert("Your browser does not support XMLHTTP!");
			return;
		}
		var url = "include/kereses.php?kit=" + user;
		xmlhttp.open("GET",url,false);
		xmlhttp.send(null);
		//var datas = xmlhttp.responseText;
		
		document.getElementById('hsz').style.display = "";
		document.getElementById("hsz").innerHTML = "<b>C&iacute;mem:</b><br>" + xmlhttp.responseText;
	}
}


function tanszekek(f) {
	
	var ennyi = f.tantargyak_lista.length;
	for (var k = ennyi - 1; k >= 0; k--) {
		f.tantargyak_lista.remove(k);
	}
	
	if (window.XMLHttpRequest) {
		// code for IE7+, Firefox, Chrome, Opera, Safari
		xmlhttp = new XMLHttpRequest();
	} else if (window.ActiveXObject) {
		// code for IE6, IE5
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
	} else {
		alert("Your browser does not support XMLHTTP!");
		return;
	}
	
	var url = "include/kereses.php?tanszek=" + f.tanszekek_lista.value;
	xmlhttp.open("GET",url,false);
	xmlhttp.send(null);
	var datas = xmlhttp.responseText;

		newOptionName = new Option("-- összes --", "osszes");
		f.tantargyak_lista.options[f.tantargyak_lista.options.length] = newOptionName;
		
		a = datas.split("|");
		
		for ( i = 0; i <= (a.length)-2; i++ ) {
			
			b = a[i];
			c = b.split(";");
			
			id = c[0];
			nev = c[1];
			tantargykod = c[2];
			newOptionName = new Option(nev, id);
			f.tantargyak_lista.options[f.tantargyak_lista.options.length] = newOptionName;
			
	}
}