I just want to create simple conditional drop-down menu without any database.
For example one menu will list camera brands like (Nikon, Canon, Sony etc...) another will list Models related to to that brand.
From first menu user will select brand which automatically shows only that models which are related to that particular brand in second menu. AND user must select first menu...
After the selection when user will click on submit button he will rediredted to predefined URL related to that model.