Definieren mehere Input Parameter in einer Variable for stored procedure

[gholam]

Hi

I have a stored procedure running under sybase.

1- I would like

to define an input parameter where the user itself has to put the input parameter and the input parameter is a choic of the following:

folder

box10

LON-20

folder-30

2- Hhat is the sql command for avoiding the user to input the wrong string instead of the above parameters.

many thanks in advance