var xmlHttp = null;
                        function GetDateTime(timeZone){
                                if (window.XMLHttpRequest)
                                        xmlHttp = new XMLHttpRequest();
                                else
                                        if (window.ActiveXObject)
                                                xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");

                                if (xmlHttp == null){
                                        alert("Błąd inicjalizacji obiektu HTTP Request");
                                        return;
                                }

                                var url = "GetDateTime.php?timeZone=" + timeZone + "&sid=" + Math.random();
                                xmlHttp.onreadystatechange = SetDateTime;
                                xmlHttp.open("GET", url, true);
                                xmlHttp.send(null);
                        }

                        function SetDateTime(){
                                if (xmlHttp.readyState == 4 ||
                                        xmlHttp.status == 200){
                                        var cbxCountry = document.getElementById("cbxCountry");
                                        document.getElementById("lblDateTime").innerHTML = xmlHttp.responseText;
                                }
                        }