function prepareRequest() {
	var http_request = false;
	if (window.XMLHttpRequest) {
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
		}
	} else if (window.ActiveXObject) {
        try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {
            }
        }
    }
    if (!http_request) {
      alert('Request Error!');
      return false;
    }
	return http_request;
}

function loadCities(scriptURL) {
	document.getElementById('citylistdiv').innerHTML = '<select disabled=\"disabled\" style=\"width: 200px;\" id=\"citylist\"><option value=\"-1\">Please wait...</option></select>';
	document.getElementById('countrylist').disabled = 'disabled';
	http_request = prepareRequest();
    http_request.onreadystatechange = function() { 
    	writeContents(http_request);
    }
    var url = scriptURL + '/citylist.php?countryid=' + document.getElementById('countrylist').value;
    http_request.open('POST', url);
    http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=windows-1251');
	http_request.send('get=true');
}

function writeContents(http_request) {
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			var respText = http_request.responseText;
			document.getElementById('citylistdiv').innerHTML = respText;
			document.getElementById('countrylist').disabled = false;
		} else {
	    	alert('Request Error!');
	    }
	}
}

function changeLocation(lang) {
	var cityId = document.getElementById('citylist').value;
	if (cityId != "" && cityId != -1) {
		var url = "index.php?cityid=" + cityId + "&lang=" + lang;
		document.location.href = url;
	} else {
		document.location.reload();
	}
}

function selectLocation(citylinkView, lang) {
	var cityId = document.getElementById('citylist').value;
	if (cityId != "" && cityId != -1) {
		var url = "index.php?" + citylinkView + "&cityid=" + cityId + "&lang=" + lang;
		document.location.href = url;
	} else {
		document.location.reload();
	}
}