Displaying current month in prompt

Hi,

I want to show the current month as the default value in Prompt in XI R3.1 Webi. i.e. when the user runs the report, the prompt for "Month" should show the current month (Say March) and if user wants to change it he can change it to someother month.

Pls let me know how to acheive this (May be by doing changes to report or to the Universe).

Regards

Jim