search for: autocompet

I''m trying to populate a field named "file_name" based on the input of a field named "title". So, for instance, based on the following input in the "title" field: My Title Is Awesome I would want the following "file_name" to be autocompeted on the fly: My_Title_Is_Awesome I''ve been going over all the autocomplete examples out there, but since they all seem to apply only to pulling data from a model, I''m not sure how I could approach this. Surely others have done something like this in rails. Any suggestions?...