I think that you should change this method to accept two arguments; the first one would be the string you're looking for, and the second would be the dropdown list object from the dom.  Then you can just walk through the list of items in the dropdown list and find the one with the matching string, and return that index.  That's safer and cleaner than having a hard-coded list that needs to be kept in sync with the place where you populate the ddl's.