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<form method="post" action="./yourscript.pl">
<input type="hidden" name="cinfo" value=$cinfo>
<input type="Submit">
</form>

# Look this Package up on Perlmonks to learn more about it
use CGI qw/:standard/;
...
my $cinfo = $Query->param('cinfo'); 
print $Query->header();
print $cinfo;