var photoID;
 function changeProvince(id) {
 		var id = (id == null) ? "" : id;
        if (document.getElementById) pr = document.getElementById('province' + id);
        else if (document.all) pr = document.all['province' + id];
        else return;
        photoID = id;
        makeRequest('cities.php?province_id='+pr.value+'&divid='+photoID,'cities');
    }
    function displayCities(cities) {
        if (document.getElementById) cityDiv = document.getElementById('cityd' + photoID);
        else if (document.all) cityDiv = document.all['cityd' + photoID];
        else return;
        newDiv =  document.createElement("div");
        newDiv.setAttribute("id", "citys" + photoID);
        newDiv.innerHTML = cities;
        if (document.getElementById) citysDiv = document.getElementById('citys' + photoID);
        else if (document.all) citysDiv = document.all['citys' + photoID];
        else return;
        cityDiv.removeChild(citysDiv);
        cityDiv.appendChild(newDiv);


    }
    function makeRequest(url,type) {
        var httpRequest;

        if (window.XMLHttpRequest) {
            httpRequest = new XMLHttpRequest();
            if (httpRequest.overrideMimeType) {
                  httpRequest.overrideMimeType('text/xml');
            }
        } else if (window.ActiveXObject) {
            try {
                httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
                try {
                    httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e) {}
            }
        }

        if (!httpRequest) {
            alert('Nie można wykonać połączenia.');
            return false;
        }
        httpRequest.onreadystatechange = function() {
            displayResponse(httpRequest,type);
        };
        httpRequest.open('GET', url, true);
        httpRequest.send(null);

    }

    function displayResponse(httpRequest,type) {

        if (httpRequest.readyState == 4) {
            if (httpRequest.status == 200) {
                if (type == 'cities')  displayCities(httpRequest.responseText);
            } else {
                alert('Wystąpił problem z połączeniem');
            }
        }

    }