function showProducers(selector, emptytext, preselect, adtype)
{
    var output = '<option value="">' + emptytext + '</option>\n';
    $.ajax({
        type: "GET",
        url: "/ajax/carmodels",
        data: "service=get_producers&AdType=" + adtype,
        success: function(response){
            data = response.split("\n");
            for(i=0; i<data.length; i++) {
                if (data[i] == '')
                    break;
                line = data[i].split("|"); 
                if (preselect == line[0])
                {
                   output += '<option selected="selected" value=\"' + line[0] + '\">' + line[1] + '</option>\n';
                } else {
                    output += '<option value=\"' + line[0] + '\">' + line[1] + '</option>\n';
                }
            }
            $(selector).html(output);            
        }
    });
    
}

function showModels(selector, emptytext, preselect, producerID, groups)
{
    var output = '<option value="">' + emptytext + '</option>\n';
    $.ajax({
        type: "GET",
        url: "/ajax/carmodels",
        data: "service=" + (groups ? "get_models" : "get_models_nogroup") + "&ProducerID=" + producerID,
        success: function(response){
            data = response.split("\n");
            for(i=0; i<data.length; i++) {
                if (data[i] == '')
                    break;
                line = data[i].split("|");
                if (preselect == line[0])
                {
                   output += '<option selected="selected" value=\"' + line[0] + '\">' + line[1] + '</option>\n';
                } else {
                    output += '<option value=\"' + line[0] + '\">' + line[1] + '</option>\n';
                }
            }
            $(selector).html(output);
        }
    });
}