function requestVarosInfo() 
{
    var sId = document.getElementById("megyeazon").value;
    var oXmlHttp = zXmlHttp.createRequest();
    oXmlHttp.open("get", "getvaros.php?id=" + sId, true);
    oXmlHttp.onreadystatechange = function () 
    {
        if (oXmlHttp.readyState == 4) 
        {
            if (oXmlHttp.status == 200) 
            {
				displayVarosInfo(oXmlHttp.responseText);  
            } 
            else 
            {
				displayVarosInfo("An error occurred: " + oXmlHttp.statusText); //statusText is not always accurate
			}
        }            
    };
    oXmlHttp.send(null);
}
        
function displayVarosInfo(sText) 
{
    var divVarosInfo = document.getElementById("divVarosInfo");
    divVarosInfo.innerHTML = sText;
}