function handleHttpResponse_oras() 
{  
  if (http.readyState == 4) {
    var  results = http.responseText.split(",");
	var nr = results.length;
	var start=0;
	DeleteAllOptions('sel_aero', 'aeroport');
	AddOption('sel_aero', 'aeroport', '--selectati--', '0') ;
	DeleteAllOptions('sel_aero', 'oras');
	Disable('sel_aero', 'ida');
	Enable('sel_aero', 'oras');
	if (nr>2) {
		AddOption('sel_aero', 'oras', '--selectati--', '0') ;
		start = 1;
	} 
	var obj =  document.getElementById('oras');
		for (var i=0; i<nr; i+=2) {
		obj.options[i/2+start] = new Option(results[i+1],results[i]);
	}

	if (start==0) {
		setTimeout("updateAeroport()",0);
	}

 }
}

function updateOras() {
  var idtara = document.getElementById('tara').value;
  http.open("GET", url + 'tara='+escape(idtara), true);
  http.onreadystatechange = handleHttpResponse_oras; 
  http.send(null);
}

function handleHttpResponse_aero() 
{  
  if (http.readyState == 4) {
  	DeleteAllOptions('sel_aero', 'aeroport');
	Enable('sel_aero', 'ida');
    var results = http.responseText.split(",");
	var nr = results.length;
	var obj =  document.getElementById('aeroport');
	for (var i=0; i<nr; i+=2) {
		obj.options[i/2] = new Option(results[i+1],results[i]);
	}
  }
}

function updateAeroport() {
  var idoras = document.getElementById('oras').value;
  http.open("GET", url + 'oras='+escape(idoras), true);
  http.onreadystatechange = handleHttpResponse_aero;
  http.send(null);
}

var http = getHTTPObject(); 

function showAero() {
	 var idaero = document.getElementById('aeroport').value;
	 if (idaero.length>=3) document.location = "index.php?co_page="+gpage+"&ida="+idaero;
	 return false;
}


function getHTTPObject() {
    var xmlhttp;
    /*@cc_on
    @if (@_jscript_version >= 5)
    try {
    xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e) {
    try {
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    } catch (E) {
    xmlhttp = false;
    }
    }
    @else
    xmlhttp = false;
    @end @*/
    if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
        try {
            xmlhttp = new XMLHttpRequest();
        }         catch (e) {
            xmlhttp = false;
        }
    }
    return xmlhttp;
}