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<FORM action="http://www.example.com/survey.cgi" method="POST">
   <SELECT multiple name="select1">
...

   <INPUT type="submit" value="Send"><INPUT type="reset">
</FORM>

POST 'http://www.example.com/survey.cgi',
     [ select1 => 'Component_1_1',
       select1 => 'Component_1_2',
       select2 => 'Component_2_3',
     ];

http://www.example.com/nonexistant.cgi
   ? select1=Component_1_1
   & select1=Component_1_2
   & select2=Component_2_3

POST 'http://www.example.com/survey.cgi',
     [ ( map {; select1 => $_ } @select1_values ),
       ( map {; select2 => $_ } @select2_values ),
     ];