Keeping in mind tilly's warning above...
Using CGI.pm, the parameters are 'sticky', so if you have parameters 'cinfo' and 'pword' from the first page, just do this while printing the second page (inside whatever form they need to be in):

print hidden('cinfo'),hidden('pword');
# Or in OO style:
my $q = CGI->new;
print $q->hidden('cinfo'), $q->hidden('pword');
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