Update the Docs with an additional / better Example ?

[EmTee70]

If you put a html id into the form tag, with
form_tag({:action => 'your_action'}, method: 'get', id: 'formid')
you can get the submit on select behavior simply by:

$('#your_field').bind('railsAutocomplete.select', function(event, data){
/* Do something here /
/ alert(data.item.id); */
$('#formid').submit();

});