Hidden fields allow you to send data to the CGI program without showing that data to the user.
<INPUT TYPE="HIDDEN" NAME="name" VALUE="value">
where:
TYPE specifies that this should be a hidden field.
NAME assigns a name to the field.
VALUE assigns the value that will be sent to the CGI program.
Note that "Hidden" fields are not completely hidden from users, because any user can select the "View Source" option in their browser to see the value of these fields.