Opdatering af tekstfelter

HER ER MIN KODE:

<?php
$navn = $_SESSION['Name'];
include("functions/db_ind.inc"); ?>
<? $result = mysql_query("select * from laerer
WHERE navn = '$navn'");
while ($row = mysql_fetch_array($result)){
$id = $row["id"];
$navn = $row["navn"];
$fornavn = $row["fornavn"];
$efternavn = $row["efternavn"];
}
?>
<? $result = mysql_query("select * from news_class
WHERE id = '$artikel_id'");
while ($row = mysql_fetch_array($result)){
$artikel_id = $row["id"];
}
?>
<?php
include("functions/db_ind.inc");
$dato = date('d-m-Y');
$brugernavn = $_SESSION['Name'];
$beskrivelse = nl2br($beskrivelse);

if ($skriv){
mysql_query("INSERT INTO news_class(forfatter, titel, broedtekst, beskrivelse, billede, dato) VALUES ('$fornavn&$efternavn', '$titel', '$broedtekst', '$beskrivelse','$billede','$dato')");
}
if ($slet){
    mysql_query("DELETE FROM news_class WHERE id=$slet");
}
if ($opdater){
    mysql_query ("UPDATE news_class SET titel='$titel', broedtekst='$broedtekst', beskrivelse='$beskrivelse', billede='$billede', dato='$dato' WHERE id=$opdater");
$titel = $_REQUEST["titel"];
$broedtekst = $_REQUEST["broedtekst"];
$beskrivelse = $_REQUEST["beskrivelse"];
$billede = $_REQUEST["billede"];
}


?>   
<FORM METHOD=POST ACTION=<? echo $PHP_SELF;?>>
<INPUT TYPE=hidden NAME=skriv VALUE=1>
<table border="0" cellpadding="5" cellspacing="0">
             
<tr>
      <td align="right"><strong>Titel:</strong></td>
      <td><input type="text" name="titel" size="30" maxsize="100" value="<? echo "$titel"; ?>"></td></tr>
<tr>
      <td align="right"><strong>Br&oslash;dtekst:</strong></td>
      <td><input type="text" name="broedtekst" size="30" maxsize="100" value="<? echo "$broedtekst"; ?>"></td></tr>
     
<tr>
      <td align="right" valign="top"><strong>Tekst:</strong></td>
      <td><textarea cols="35" rows="10" name="beskrivelse"><? echo "$beskrivelse"; ?></textarea></td></tr>
<tr>
      <td align="right"><strong>Billede:</strong></td>
<input type="text" name="billede" value="<? echo $_GET['billede']; ?>">
                      </p>
                      <p><br>
                      </p>
                      </td>
                      </tr>
<tr><td></td><td>  <input type="submit" name="submit" value="Skriv!" class="button"></td></tr>
</table>
</form>
       
<?php
$today = getdate();
$month = $today['month'];
$mday = $today['mday'];
$year = $today['year'];
?>
<?
$foresp = mysql_query("SELECT * FROM news_class ORDER BY id DESC");
while($data = mysql_fetch_array($foresp))
{
// Billede
    echo "<tr>";
    echo "<td valign=\"top\" width=\"30\" style=\"height: 0px; background-image: url(frames/v.gif)\"></td>";
    echo "<td valign=\"top\" width=\"300\" style=\"height: 0px; background-image: url(frames/c.gif)\"><div align=\"center\"><img src=$data[4] width=\"200\" border=\"1\">";
    echo "</td>";
    echo "<td valign=\"top\" width=\"30\" style=\"height: 0px; background-image: url(frames/e.gif)\"></td>";
    echo "</tr>";



// Titel
    echo "<tr>";
    echo "<td valign=\"top\" width=\"30\" style=\"height: 20px; background-image: url(frames/v.gif)\"></td>";
    echo "<td valign=\"top\" width=\"300\" style=\"height: 20px; background-image: url(frames/c.gif)\"><h3><b>$data[2]</b></h3>";
    echo "</td>";
    echo "<td valign=\"top\" width=\"30\" style=\"height: 20px; background-image: url(frames/e.gif)\"></td>";
    echo "</tr>";

// Broedtekst   
    echo "<tr>";
    echo "<td valign=\"top\" width=\"30\" style=\"height: 20px; background-image: url(frames/v.gif)\"></td>";
    echo "<td valign=\"top\" width=\"300\" style=\"height: 20px; background-image: url(frames/c.gif)\"><b>$data[3]</b>";
    echo "</td>";
    echo "<td valign=\"top\" width=\"30\" style=\"height: 20px; background-image: url(frames/e.gif)\"></td>";
    echo "</tr>";

// Beskrivelse
    echo "<tr>";
    echo "<td valign=\"top\" width=\"30\" style=\"height: 30px; background-image: url(frames/v.gif)\"></td>";
    echo "<td valign=\"top\" width=\"300\" style=\"height: 30px; background-image: url(frames/c.gif)\">$data[5]";
    echo "</td>";
    echo "<td valign=\"top\" width=\"30\" style=\"height: 30px; background-image: url(frames/e.gif)\"></td>";
    echo "</tr>";
   
// forfatter
    echo "<tr>";
    echo "<td valign=\"top\" width=\"30\" style=\"height: 50px; background-image: url(frames/v.gif)\"></td>";
    echo "<td valign=\"top\" width=\"300\" style=\"height: 50px; background-image: url(frames/c.gif)\"><p><i>Skrevet af $fornavn $efternavn d. </i>";
    echo "<i><font class=ur> $dato</font></i>";
    echo "<a href=\"?slet=$data[id]\"><blockquote>Slet</a>";
    echo "<a href=\"?opdater=$data[id]\"><blockquote>Slet</a>";
    echo "<hr>";
    echo "</td>";
    echo "<td valign=\"top\" width=\"30\" style=\"height: 50px; background-image: url(frames/e.gif)\"></td>";
    echo "</tr>";


}
?>

Hvornår får $skriv, $slet og $opdater værdi?

Skriv og slet virker. Det er mere opdater. Jeg sætter en værdi under forfatter.

Jeg lukker