Conditionally Populating Values in the Drop Downs

Hi,

I have a webi report which has a two drop downs.

First drop down contains the Country names.

The other drop down contains the State names.

The requirement is such that when the user selects a particular country e.g. United States from the first drop down ...then only the States that belong United States should populate the other drop down.......

I would like to know if there is a way we can conditionally populate values in the drop downs.

Thank you,

boe user