Query browser - pass dynamic default value

Hi Gurus,

I am using query browser to connect to BEx query in my dashboard 4.0. I have one requirement where I want to access the data from query based on dynamic value. e.g. I want to display data for Week to date i.e. current week to yesterday (sunday - yesterday). same way for month to date (as current month is july, so from 1 july to 10 july). i have searched over the internet and found that I can't pass dynamic value from excel to query prompt selector. any pointers that how can I achieve this and what component should I use for this. I have requirement for Week to date, Month to date and year to date.

Thanks,

Rajwinder