on goToThumbs
  
  --  list of all possible values of gUsersChoice
  
  set usersChoiceList to ["Arizona", "CaliforniaSD", "CaliforniaSF", "Connecticut", "Florida", "Illinois", "Louisiana", "Maine", "Maryland", "Massachusetts", "Minnesota", "Missouri", "Montana", "Nevada", "New Jersey", "New Mexico", "New York", "Oregon", "Pennsylvania", "South Carolina", "Tennessee", "Texas", "Virginia", "Washington", "Wyoming"]
  
  --  list of corresponding values for thumbnail movie
  set categoryList to ["AZ", "CASD", "CASF", "CT", "FL", "IL", "LA", "ME", "ML", "MA", "MN", "MS", "MO", "NV", "NJ", "NM", "NY", "OR", "PA", "SC", "TN", "TX", "VA", "WA", "WY"]
  
  --  figure out what the position of gUserChoice is in the usersChoiceList and then locate the corresponding item in categoryList to set gCategory
  set listPos to getPos(usersChoiceList, gUsersChoice)
  set gCategory to getAt(categoryList, listPos)
  
  
  setThumbScreen
  set gSection to #thumb
  puppetTransition gTransition
  go to frame "thumbDisplay"
end