function DropDown(target, label_list, value_list, name){
    addElementClass($(target), 'select');
    
    var lista = '';

    for(no in label_list){
       lista += '<option value="'+value_list[no]+'">'+label_list[no]+'</option>';
       signal(name, 'route_type_change', name+'_name')
    }

    $(target).innerHTML = lista;
}