how to set multiple values for any variable or any field.

[#1]

HI,

"monthname" is one of the field where all month name is present.

monthname
Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

when i open the qlikview document i want that the monthname field automaticaly selects the 3 months in cluding today date month.

for eg-

today's date is 4 th oct 2013 so it will select the aug sep oct.

Please help in this for seleting multiple values for any variable or any field.