Ok, here goes. I'm creating an application to store specific keyword information. I need to be able to associate certain keywords with certain groups. I've come up with a way to do this, using dropdown menus. There are general categories (Shape, Color, Gemstone, etc.) and when one is selected, I need a second dropdown menu populated with things relevant to the option chosen in the first dropdown. For example, if I choose 'Gemstone', the next dropdown would have options for sapphire, ruby, diamond, etc. Any tips on how to do this?