problem with session

[SAN CAZIANO]

My site has:

- 1 frame in top where I have some images to change the language of
the site if clicked

- 1 frame at left for the menu

- 1 frame at middle to load the page chosen in menu

in the index.php my code is

(i save in a var the name of the page displayed and the language active)

if(!isset($_SESSION['mainform']))

{

$_SESSION['mainform'] = "main.php";

}

if(!isset($_SESSION['language']))

{

$_SESSION['language'] = "ITA";

}

in the TopFrame my code is

<SCRIPT language="JavaScript">

function LanguageChange(language)

{

//i get the current viewed page
document.TopForm.main_form.value=parent.document.a ll.mainFrame.src;

//i change the site language

switch (language)

{

case 'ITA':
document.TopForm.selected_language.value='ITA';

<?php $_SESSION['language']='ITA'; ?>

break;

case 'ENG':
document.TopForm.selected_language.value='ENG';

<?php $_SESSION['language']= 'ENG'; ?>

break;

}

document.TopForm.submit();

}

</SCRIPT>

$TMPLAN=$_ SESSION ['language'];

echo"

<form name=\"TopForm\">

<input name=\"selected_language\" type=\"hidden\" value=\"$TMPLAN\">

<input name=\"main_form\" type=\"hidden\" value=\"main.php\">

<table>

<tr>

<td>

&nbsp;<img src=\"../italiano.bmp\" onClick=\"LanguageChange('ITA')\">

</td>

<td>

&nbsp;<img src=\"../inglese.bmp\" onClick=\"LanguageChange('ENG')\">

</td>

</tr>

</table>

";

in una mia pagina che carico al FrameCentrale utilizzo queste istruzioni

(i have to read the variable of the 2 session or read the value in
document.TopForm.selected_language)

<?php

if ($_SESSION['language']=='ITA')

echo "testo italiano";

else

if ($_SESSION['language']=='ENG')

{

echo "testo inglese";

}

?>

the problem is that i can't change the language as i aspect.

Can anyone help me as soon as possible, please.