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$agent->get('http://rna.tbi.univie.ac.at/cgi-bin/RNAfold.cgi'); $agent->form_number(1); ... $agent->field('Sequence', 'GATTACAGATTACAGATTACA'); $agent->field('pffold', 'pf'); $agent->click('Action');
<input type="hidden" name="rec-form1-submit-Action" value=1> <input type="submit" name="Action" value="Fold it"> ^^^^^^