//var hide_empty_list=true; //uncomment this line to hide empty selection lists

var disable_empty_list=true; //uncomment this line to disable empty selection lists

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

addOption("car-makers", "Select a System", "", "", 1); //Empty starter option
addList("car-makers", "Sony Playstation 3", "Sony Playstation 3", "Sony Playstation 3");
addList("car-makers", "Microsoft Xbox 360", "Microsoft Xbox 360", "Microsoft Xbox 360");

addOption("Sony Playstation 3", "Select HD Capacity", "", "", 1); //Empty starter option
addList("Sony Playstation 3", "250GB - Slim", "250GB", "No-Backward-Compatible");
addList("Sony Playstation 3", "160GB", "160GB", "No-Backward-Compatible");
addList("Sony Playstation 3", "120GB - Slim", "120GB", "No-Backward-Compatible");
addList("Sony Playstation 3", "80GB", "80GB", "Select-Backward-Compatibility");
addList("Sony Playstation 3", "60GB", "60GB", "Backward-Compatible");
addList("Sony Playstation 3", "40GB", "40GB", "No-Backward-Compatible");
addList("Sony Playstation 3", "20GB", "20GB", "Backward-Compatible");

addOption("No-Backward-Compatible", "No Backward Compatible", "No Backward Compatible");

addOption("Backward-Compatible", "Backward Compatible", "Backward Compatible");

addOption("Select-Backward-Compatibility", "Select Backward Compatibility", "");
addOption("Select-Backward-Compatibility", "Backward Compatible", "Backward Compatible");
addOption("Select-Backward-Compatibility", "No Backward Compatible", "No Backward Compatible");