passing arrays to script

Hi im trying to take the arrays day and band
into the (if month) script and then loop through arrays and echo each varible in both arrays.
In the manual each() and list()leave me really confused.
thanks in advance.

<input type="hidden" name="day[]><br> <input type="text" name="band[]"><br>
<input type="hidden" name="day[]><br> <input type="text" name="band[]"><br>
<input type="hidden" name="day[]><br> <input type="text" name="band[]"><br>

<input type="submit" name="makemonth">

if ($makemonth) {
while (list ($day, $band) = each ($HTTP_POST_VARS)) {

echo $day;
echo $band;
}
}