param() is the perl/cgi command to receive data from an HTML form
HTML FORM:
<INPUT TYPE="HIDDEN" NAME="dayofweek" VALUE="FRIDAY">
sends data to
---->
Perl program:
$day = param ('dayofweek');
$day will then have FRIDAY as it's value.
>What's "param()"?
> perldoc -f param
>does not show that Perl has a built-in function named "param".