Quickest way to modify a form

Quickest way to modify a form

please view  my form here:  FORM

As you will see it is used as an application for prospective employees.

There are hidden fields that assign the corresponding manager to the applicant based on the location the choose to apply for.

The trouble I am having is that our company is adding and removing locations frequently.  What I do now is edit the form by adding or deleting the location, then I go in to the script  and add/delete/edit as needed.

if (input.Location  ==  "Auburn, AL")
{
    input.Assign_To = "Roy Johnson";
}

So, if there are 5-10 changes it leaves a lot of room for error on my part.

I was wondering if anyone knows of a faster, easier way to make these changes.  I guess the biggest issue is how to assign the applicant to the manager without getting into the script.