filter by drop down menus

Question

I have 2 column page the first column : I want to create 2 drop down menus. The first contains the categories and the second has the posts that are related to the category.

With a meaning that when someone chooses the category (laptops) in the second menu only the laptops would appear. And when choosing both options and clicking submit the posts on the the other column would filter to only the product that he selected.

can you please help me with either one of them and your help would be appreciated.

Answer 1

Follow this example (Nested Combos):

http://www.prodiven.com/jcombo/