I've a problem with iframe. My first file filtre.html contain iframe with a basic code like this:

```
<iframe name="filtre_demo" src="http://localhost:8888/modules/filtredemo/filtre.php" scrolling="no" height="220" width="220" frameborder="no"></iframe>

```

This file filtre.php is a drop down dynamic list with 3 levels (PHP/MYSQL).

Filtre.php this file is actually a dynamic dropdown 3 levels and will find info in a DB. The submit sent to a URL and all working fine.

My problem is with iframe. When I click on submit, target page is found in this part of 220x220 instead of reloading the parent page.

I tried several solutions to no avail. Here is part of my php file (I deliberately truncated several parts) including the header location and the form:

```
     $ligne=mysql_fetch_assoc($rech_lien);
     $lien=$ligne['lien'];
     header('Location:'.$lien.'');

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr">
<head>
</head>
<body style="font-size: 75%; width: 210px;">

<form action="<?php echo($_SERVER['PHP_SELF']); ?>" method="post" id="chgcategories">

<fieldset style="border: 0px">
    <select name="modele" id="modele" onchange="submit();">
        <option value="-1">-Choisissez un modele-</option>
                <select name="sous_categorie" id="sous_categorie">
                    <option value="-1">-Sous-cat-</option>
                </select>
                <input type="hidden" name="nb_listes"  value="3" />
                <br /><br />
                <input type="submit" name="ok" id="ok2" value="Envoyer"/>
</form>

```

I also tried with javascript but without success. In this configuration there I removed the line:

```
header('Location:'.$lien.'');

```

Here is the javascript code in the header:

```
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr">
<head>
<script type="text/javascript">
parent.document.location.href="<?php echo $lien; ?>";
</script>
</head>
<body style="font-size: 75%; width: 210px;">

```

The problems in this case is that the document load loop. 

Anyway, I'm stuck, I thank you in advance for your help.

Vincent