Selection and button

I have selection like


シフト表CSV出力l
template_of_roster1.xml
template_of_roster2.xml
template_of_roster3.xml

and also one button.

I want to write a condition like
if I choose option id==tmp1
when I click the button,want to run converter
if I choose option id ==conv
when I click the button,want to run demand_csv

I have one question more about button, is it possible to run two method
in onclick event?
like when I click button can I run converter also saving.?

thanks for any help