print $q->start_form(-method => 'POST',  -action=>"myAction.pl");
# <form method="post" action="myAction.pl" 
#  enctype="application/x-www-form-urlencoded">


print $q->start_form(
  -method => 'POST', 
  -enctype => &CGI::URL_ENCODED, 
  -action=>"myAction.pl");
# <form method="post" action="myAction.pl" 
# enctype="application/x-www-form-urlencoded">

and

print $q->start_form(
  -method => 'POST', 
  -enctype => &CGI::MULTIPART, -action=>"myAction.pl");
# <form method="post" action="myAction.pl" enctype="multipart/form-data">