var hide_empty_list=true;

addListGroup("vehicles", "car-makers");

addList("car-makers", "Select make", "", "dummy-maker", 1);
addList("car-makers", "Toyota", "Toyota", "Toyota");
addList("car-makers", "Honda", "Honda", "Honda");
addList("car-makers", "Chrysler", "Chrysler", "Chrysler");
addList("car-makers", "Jeep", "Jeep", "Jeep");

addList("dummy-maker", "Not available", "", "dummy-car");

addOption("dummy-car", "Not available", "");

addList("Toyota", "Select model", "", "dummy-toyota");
addList("Toyota", "Avalon", "car", "Avalon");

addOption("dummy-toyota", "Not available", "");

addOption("Avalon", "Select color", "");
addOption("Avalon", "Blue", "Blue");
addOption("Avalon", "Red", "Red");
addOption("Avalon", "Yellow", "Yellow");

addList("Honda", "Select vehicle type", "", "dummy-honda");
addList("Honda", "Cars", "car", "Honda-Cars");
addList("Honda", "SUVs/Van", "suv", "Honda-SUVs/Van", 1);

addOption("dummy-honda", "Not available", "");

addOption("Honda-Cars", "Select model", "");
addOption("Honda-Cars", "Accord Sedan", "Accord Sedan");
addOption("Honda-Cars", "Accord Coupe", "Accord Coupe");
addOption("Honda-Cars", "Civic Sedan", "Civic Sedan");
addOption("Honda-Cars", "Civic Coupe", "Civic Coupe");
addOption("Honda-Cars", "Civic Hybrid", "Civic Hybrid");

addOption("Honda-SUVs/Van", "Select a model", "");
addOption("Honda-SUVs/Van", "CR-V", "CR-V");
addOption("Honda-SUVs/Van", "Pilot", "Pilot");
addOption("Honda-SUVs/Van", "Odyssey", "Odyssey", 1);

addList("Chrysler", "Select vehicle type", "", "dummy-chrysler");
addList("Chrysler", "Cars", "car", "Chrysler-Cars", 1);
addList("Chrysler", "SUVs/Van", "suv", "Chrysler-SUVs/Van");

addOption("dummy-chrysler", "Not available", "");

addOption("Chrysler-Cars", "Select model", "");
addOption("Chrysler-Cars", "300M", "300M");
addOption("Chrysler-Cars", "PT Cruiser", "PT Cruiser", 1);
addOption("Chrysler-Cars", "Concorde", "Concorde");
addOption("Chrysler-Cars", "Sebring Coupe", "Sebring Coupe");

addOption("Chrysler-SUVs/Van", "Select model", "");
addOption("Chrysler-SUVs/Van", "Town & Country", "Town & Country");
addOption("Chrysler-SUVs/Van", "Voyager", "Voyager");

addList("Jeep", "Select vehicle type", "", "dummy-jeep", 1);
addList("Jeep", "Cars", "car", "Jeep-Cars");
addList("Jeep", "SUVs/Van", "suv", "Jeep-SUVs/Van");

addOption("dummy-jeep", "Not available", "");

addOption("Jeep-Cars", "Select model", "", 1);
addOption("Jeep-Cars", "300M", "300M");
addOption("Jeep-Cars", "PT Cruiser", "PT Cruiser");
addOption("Jeep-Cars", "Concorde", "Concorde");
addOption("Jeep-Cars", "Sebring Coupe", "Sebring Coupe");

addOption("Jeep-SUVs/Van", "Select model", "", 1);
addOption("Jeep-SUVs/Van", "Town & Country", "Town & Country");
addOption("Jeep-SUVs/Van", "Voyager", "Voyager");