Filtering on characteristic values

HI Guru’s,

Does anyone has a nice solution for the following problem:

Query with characteristic ABC. Characteristic ABC can have the following values: 10, 20, 30.....90 (so 9 values). My client has the following demands for the query:

• Only values 10, 20, 30, 40 en 50 are relevant for the query.

• Default value for the query are the values 10, 20 and 30.

• The user is allowed to make additional selections via navigation for the values 40 en 50.

• The user is <b>not allowed</b> to make additional selections for the values 60, 70, 80 en 90. Although these values do exist, they are not relevant for the query.

• Selection-screen is suppressed in the WebTemplate

Anyone has a nice solution for this?

Thnx in advance,

Henk.