Corresponding Drop Down Menu

Hi
My category of product has two levels - main category and sub category.
Sample data show as follow:
Main Category Sub Category


drink juice
drink soda pop
drink water
food fruit
food cake
food candy

I have two drop down menus for main category and sub category.
If main category choices “drink”, sub category only can show juice, soda
pop, and water.
Is it possible?
Please help if you can.
Thanks in advance,

Webber Han

I have two drop down menus for main category and sub category.
If main category choices “drink”, sub category only can show juice, soda
pop, and water.
Is it possible?

“Tiered” fields like this will be in the next major release of RT.