How do I call a defined function in another Javascript

Question

Here is the code in languageSwitcher.js

$('#selectlanguage').change(AnyFunctionfromAnotherJsFile);

I do not want to make AnyFunctionfromAnotherJsFile as global function.

Answer 1

This waits for on change and runs a function that calls setButtonText();

$('#selectlanguage').change(function(){
   setButtonText();
});