// declare new variables for each new div that you add, and link to the div by ID
// var region_div = document.getElementById("region_div");
var doc = null;

function ajax() {
        // Make a new XMLHttp object
        if (typeof window.ActiveXObject != 'undefined' ) doc = new ActiveXObject("Microsoft.XMLHTTP");
        else doc = new XMLHttpRequest();
}

function SelectCountry(section, destination){
            ajax();
                // Load the result from the response page
                // ** As far a I know firefox will only load a document on the SAME domain!!
            if (doc){
               destination.innerHTML = "Loading data...";
               doc.open("GET", "location.php?sec=" + section + "&sel=country", false);
               doc.send(null);
                    // Write the response to the div
               destination.innerHTML = doc.responseText;
            }
            else{

               destination.innerHTML = 'Browser unable to create XMLHttp Object';
            }
}

//function SelectRegion(section, id_country, destination, destination2){
function SelectRegion(section, id_country, destination){
    if (id_country != '') {
                ajax();
                // Load the result from the response page
                // ** As far a I know firefox will only load a document on the SAME domain!!
            if (doc){ 
               destination.innerHTML = "Loading data...";
               doc.open("GET", "location.php?sec=" + section + "&sel=region&id_country=" + id_country, false);
               doc.send(null);
                    // Write the response to the div
               destination.innerHTML = doc.responseText;
            }
            else{

               destination.innerHTML = 'Browser unable to create XMLHttp Object';
            }
    }
    else {
            destination.innerHTML = "Country is not selected";
    }
    //destination2.innerHTML = "";
}

function SelectCity(section, id_region, destination){
    if (id_region != '') {
                ajax();
                // Load the result from the response page
                // ** As far a I know firefox will only load a document on the SAME domain!!
            if (doc){
               destination.innerHTML = "Loading data...";
               doc.open("GET", "location.php?sec=" + section + "&sel=city&id_region=" + id_region, false);
               doc.send(null);
                    // Write the response to the div
               destination.innerHTML = doc.responseText;
            }
            else{

               destination.innerHTML = 'Browser unable to create XMLHttp Object';
            }
    }
    else {
            destination.innerHTML = "Region is not selected";
    }

}