Are inputs in separate forms sent when a submit button is hit?

echo("<form action="vote.php" method="post"> n");
echo("<INPUT type="hidden" name="idnum" value="".$row[0]."">");
echo("<INPUT type="submit" name="up" value="Upvote.">  n");
echo("<INPUT type="submit" name="down" value="Downvote"> ");
echo("<form/>n");

<form action="vote.php" method="post">
    <input type="hidden" name="idnum" value="<?php echo $row[0]; ?>">
    <input type="submit" name="up" value="Upvote.">
    <input type="submit" name="down" value="Downvote">
</form>