not pulling $id

[pinehead18]

OK, in this script i have 2 sql statements. The first one will pull and echo the correct id which is $id. But when the if ($submit) statement is pulled it will not echo or read the id so therefore it will not update.

Any suggestions on this?

<?php
        if ($Submit) {
        $name = $HTTP_COOKIE_VARS['user'];
        $con =  mysql_connect("localhost","","i") or die(mysql_error());
        $db = mysql_select_db("pinehead",$con) or die(mysql_error());
        $sql = "UPDATE web SET subject = '$subject', body = '$body' WHERE id = '$id'";
        mysql_query($sql,$con);
        echo $sql;
//      header("location: ");
        mysql_close();
  }



    $name = $HTTP_COOKIE_VARS['user'];
    $con = mysql_connect("localhost","","") or die(mysql_error());
    $db = mysql_select_db("pinehead",$con) or die(mysql_error());
    $sql = "SELECT * FROM web where id='$id' and user='$name'";
    $result = mysql_query($sql,$con) or die(mysql_error());
    $row = mysql_fetch_array($result) or die(mysql_error());

    $subject = $row['subject'];
    $body = $row['body'];
    $uname = $row['user'];


    $_POST['id'];


$output = "<table border=0 cellpadding=0 cellspacing=0 width=90%>
                <form action=".$PHP_SELF." method=post>
<tr>
                    <td>Subject:</td>
                </tr>
                <tr> 
                    <td><input type=text name=subject value=".$subject."></td>
                </tr>
                <tr> 
                    <td>Body</td>
                </tr>
                <tr> 
                    <td><textarea cols=35 rows=15 name=body>".$body."</textarea></td>
                </tr>
                <tr> 
                     <td><input type=submit value=Update name=Submit></td>
                <td><a href=web.php>Cancel Changes</a></td>
                </tr>
        </form>
        </table>";






?>
  

Thank you
Anthony