// define a list group
addListGroup("vehicles", "makers");

// and its top list
addList("makers", "Toyota", "Toyota", "toyota-list");
addList("makers", "Honda", "Honda", "honda-list");
addList("makers", "Chrysler", "Chrysler", "chrysler-list");

// sub-list for toyora
addList("toyota-list", "Car", "Car", "toyota-car");
addList("toyota-list", "SUVs/Van", "SUVs/Van", "toyota-suv/van");
addList("toyota-list", "Trucks", "Trucks", "toyota-truck");

// sub-list for honda
addList("honda-list", "Car", "Car", "honda-car");
addList("honda-list", "SUVs/Van", "SUVs/Van", "honda-suv/van");

// sub-list for chrysler
addList("chrysler-list", "Car", "Car", "chrysler-car");
addList("chrysler-list", "SUVs/Van", "SUVs/Van", "chrysler-suv/van");

// sub-list for toyota car
addOption("toyota-car", "Avalon", "Avalon");
addOption("toyota-car", "Camry", "Camry");
addOption("toyota-car", "Celica", "Celica");
addOption("toyota-car", "Corolla", "Corolla");

// sub-list for toyota suv/van
addOption("toyota-suv/van", "4Runner", "4Runner");
addOption("toyota-suv/van", "Highlander", "Highlander");
addOption("toyota-suv/van", "Land Cruiser", "Land Cruiser");
addOption("toyota-suv/van", "Sienna", "Sienna");

// sub-list for toyota truck
addOption("toyota-truck", "Tacoma", "Tacoma");
addOption("toyota-truck", "Tundra", "Tundra");

// sub-list for honda car
addOption("honda-car", "Accord", "Accord");
addOption("honda-car", "Civic", "Civic");
addOption("honda-car", "S2000", "S2000");

// sub-list for honda suv/van
addOption("honda-suv/van", "CR-V", "CR-V");
addOption("honda-suv/van", "Pilot", "Pilot");
addOption("honda-suv/van", "Odyssey", "Odyssey");

// sub-list for chrysler car
addOption("chrysler-car", "PT Cruiser", "PT Cruiser");
addOption("chrysler-car", "Sebring", "Sebring");

// sub-list for chrysler suv/van
addOption("chrysler-suv/van", "Town & Country", "Town & Country");
addOption("chrysler-suv/van", "Voyager", "Voyager");