Не так работает this.form.submit()

<form method="post" action="interpreter.php">
    <tr>
        <td align='right'>Новости</td>
        <td><select style="width: 500px; height: 20px;" name="news" onchange='this.form.submit()'>

....<form method="post" action="interpreter.php">
    <tr>
        <td align='right'>Зал(Помещение) показа</td>
        <td><select style="width: 300px; height: 20px;" name="build" onchange='this.form.submit()'> 
...
<form method="post" action="interpreter.php">
    <tr>
            <td align='right'>Правила бронирования билетов на сеанс</td>
            <td><select style="width: 300px; height: 20px;" onchange='this.form.submit()' name="rules">
....

<form method="post" action="x.php">
    <table>
    <tr>
        <td align='right'>Новости</td>
        <td>
            <select style="width: 500px; height: 20px;" name="news" onchange='this.form.submit()'> 
                <option>1</option>
                <option>2</option>
            </select>
        </td>
    </tr>
    </table>
</form>

<form method="post" action="">
    <table><tr>
        <td align="right">Новости</td>
        <td><select style="width: 500px; height: 20px;" onchange="this.form.submit()" name="news">          
<?php
while ($news = mysql_fetch_assoc($news_query)) 
{
    $nameWithCount=$news['newsdesk_article_name']."/numberSelect/".$c;
    echo ("<option name=\"{$news[newsdesk_id]}\" value=\"{$nameWithCount}\"> {$news[newsdesk_article_name]}</option>");
}
    mysql_free_result($news_query);
?>
        
        </select></td>
    </tr></table>
</form>

<form method="post" action="">
    <table><tr>
            <td align='right'>Правила бронирования билетов на сеанс</td>
            <td><select style="width: 300px; height: 20px;" onchange="this.form.submit();" name="rules">
    <?php
    while ($rules = mysql_fetch_assoc($rules_bronned_query)) 
    {
        $rulesWithCount=$rules['rb_name']."/numberSelect/".$c;
        echo ("<option name=\"{$rules[rb_id]}\"  value=\"{$rulesWithCount}\">{$rules[rb_name]}</option>");
    }
        mysql_free_result($rules_bronned_query);
    ?>
 
            </select></td>
        </tr></table>
</form>