Dependant dimensions on selecting one member in one dimension

Hello everybody
I'm a sort of newbie with MS Analysis Services 2000 and i have a problem.
I don't know how to implement the following 2 dimensions:
- A calendar time dimension and
- Additionally, An interval time dimension (e.g. Anual, Quarterly, monthly)
In such a way that when an element in the Interval dimension automatically can only be selected those in the calendar dimension that belongs to this period of time

For instance
Int. dimension
1. Anual
2. Quarterly
3. Monthly

Calendar Dimension
- 2005
---2005-Q1
-----2005-Jan
-----2005-Feb
-----2005-Feb
---2005-Q2
...


And if 2. Quaterly is selected only can be seen in Calendar Dimension
---2005-Q1
---2005-Q2

Any hint??

Thanks in advance.
Fausto