Error when autocompleting a hidden field

[thiago-paim]

I'm using the autocomplete to fill some city fields on my website. In one specific section, i leave the autocomplete field hidden, then i fill it automatically so i can send it on a form (I know this probably isn't the best way to do it, being on a tight schedule it was the best i could think of).

When i do this using Google Chrome, it works perfectly. But when I use Firefox, i get the following error:
NS_ERROR_FAILURE: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIDOMHTMLInputElement.setSelectionRange]

It points out to line 979:
input.setSelectionRange(start, end);

This error only happens when the autocompleting field is hidden, and i'm using Firefox.

Does anyone have an idea about what's going on, or how to fix it?