schedule and radio button help please

Two things,

1. ive got a window and have set two radio buttons within the window. I cant seem to get which button being chosen. I tried to set a varible to variable field but nothing happend.
i even try to set a function to the command field so it would call the function and set a variable but no joy.

2. Im trying to set a schedule which calls a particular function but i'm stuck on actually how to call it.

example: the function would normaly be called like
this.myfunction();

how would i do that within a shedule as it only takes strings such 'myfunction'

any help on either problem would be much appriciated