Noted gratefully. I was trying to identify my input within a form, naturally, but it turned out to be difficult (the authors of the webpage seem to be a bit paranoid, anyway), that's why I was working on something else.

Maybe a new method

...->set_nasty_value
[download]

I'm not sure why ->set_nasty_value would be sp special, but I can see that adding a modification of ->field() which does take a plain DOM node instead of a field name would be convenient. The routine would reduce to

sub set_nasty_value {
    my( $self, $dom_node, $value )= @_;
    $self->get_set_value( name => $dom_node, value => $value )
}
[download]

... so maybe just call it that way directly.

I think I should document that part of ->get_set_value a bit better.

Thanks a lot for all your comments, Corion.

Now everything must be learned hard way, however good are tools at one's disposal, unlike the blessed times when reading a just few pages on WWW::Mechanize opened the whole world for you almost immediately.

Necessary documentation in hand, the only way now is to automate as many pages as possible, starting with relatively simple ones.