Automatically fill combobox in views

I have created views with a node type (Property) that has term reference to vocabulary (Cities).
Vocabulary (Cities) has a terms in a hierarchical order (City-Street).

I need to do the views in which I have two combobox for vocabulary terms (City-Street) with the following behavior:

• When user select a City I would like to automatically fill the second combobox(Street).
• When user select City I need a list all of the streets for that terms. Now I have a list only when user select an item from combobox Street.

I have tried the Hierarchical Select module and it didn't meet my needs.

Do I need to make my own module, and which hook or hooks to use, or is there another solution?

I hope that I was clear.

Thanks in advance.

Best regards,

Goran