I have a pulldown that lists food locations. I would like to create a javascript entry that says if it is a particular location that it is in building b .. another location would show building c .. so on and so forth.

I am creating a work order system.  We have food locations on campus and I would like a javascript entry that if it is at a certain food location then it is in building a.  If it is another location it is in building b.  So, I have the food location as a pulldown menu.  And I have the building locations as a list.  So, i was just wondering if we could use Javascript or an action script to make this possible.