function makeRequest(url,sendData,layerName) {
 var http_request = false;
  if (window.XMLHttpRequest) {
   http_request = new XMLHttpRequest();
   if (http_request.overrideMimeType) {
    http_request.overrideMimeType('text/xml');
   }
  } 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) {
    document.write('Feladtam :( Nem tudok XMLHTTP példányt létrehozni');
//    alert('Feladtam :( Nem tudok XMLHTTP példányt létrehozni');
            return false;
   }
    http_request.onreadystatechange = function() { alertContents(http_request,layerName); };
    http_request.open('POST', url, true);
    http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    http_request.send(sendData);
}

function alertContents(http_request,layerName) {
 if (http_request.readyState == 4) {
  if (http_request.status == 200) {
   document.getElementById(layerName).innerHTML=http_request.responseText;
  } else {
     document.write('Valami gond van a kéréssel.');
    }
 }
}

function egynapkiir(layer,szoveg)
	{
	document.getElementById(layer).innerHTML=szoveg;
	document.getElementById(layer).style.visibility = "visible";
	}

function egynapbezar(layer,szoveg)
	{
	document.getElementById(layer).innerHTML='';
	document.getElementById(layer).style.visibility = "hidden";
	}