Reveal field selections based on the value of other field.

Hey,

I am creating a search with Views-module. The website is www.insureatm.eu. You can select from three major brands on Part brand field. When you open the ATM model select-list, you can see models from these major brands, Diebold, NCR and Wincor Nixdorf. The feature I´m trying to achieve is to limit the selections on the ATM model field based on the selection of the part brand.

Example:

I choose NCR as Part brand.

-> I can only see NCR models on ATM models select-list.

I choose Diebold as Part brand.

-> I can only see Diebold models on ATM models select-list.

This would reduce the amount of ATM models on the list quite a lot if you have chosen the brand and therefore make the search more user-friendly.

I know this is possible, but I just haven´t found this functionality on Views. Please help me! :)