var http = createRequestObject();
var site_url = 'http://' + window.location.hostname + '/';

function createRequestObject(){
    var request_;
    var browser = navigator.appName;

    if(browser == "Microsoft Internet Explorer" || typeof ActiveXObject != "undefined" ){
        request_ = new ActiveXObject("Microsoft.XMLHTTP");
    }else{
        request_ = new XMLHttpRequest();
    }
    return request_;
}


function getCities(c){
    http.open('get', site_url +'includes/cities.php?country_id='+c);
    http.onreadystatechange = handleInfo;
    http.send(null);
}

function handleInfo(){
    if(http.readyState == 1){
        document.getElementById('city_div').innerHTML = '<img src="'+ site_url +'images/loading.gif" alt="Loading..." />';
    }
    if(http.readyState == 4){
        if(http.status == 200 ){
            var response = http.responseText;
            document.getElementById('city_div').innerHTML = response;
        }
    }
}