HTTP_POST_VARS(as soon as possible thanks)

HI, i want to access variable , created by form method , i knew it is access by using $HTTP_POST_VARS but i am unable to use it successfully. May any body know how to access variables from $HTTP_POST_VARS array. thanks in advance Kamran H. Hassan Example. <form method="Post" action="<?php echo $PHP_SELF ?>"> <INPUT type = "text" name="regno"> .. .. .. <INPUT type="submit" name="submit" value = "login"> </form i want to access regno through out of the site. and if any one have any other idea to access it through out the site, please let me know thanks