How to re-focus to a text field when focus is lost on a HTML form?

Question

There is only one text field on a HTML form. Users input some text, press Enter, submit the form, and the form is reloaded. The main use is barcode reading. I use the follo

Answer 1

Darin's answer is right, but doesn't work in Firefox. If you want to steal focus back in Firefox too, you have to delay it until after the event:

Or, better, assigned from JavaScript:

But, I would strongly advise you not to do this. Clicking outside a text box to remove focus from that text box is perfectly normal browser behaviour, which can be of legitimate use (eg. to set search point for ctrl-F, or start a drag-selection, etc). There's very unlikely to be a good reason to mess with this expected behaviour.