NON FUNZIONA NIENTE

codice della pagina (index.php)
codice:
<!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="it" lang="it">

<head>
<title> index </title>

<SCRIPT type="text/javascript">
 function aggiornaHidden(tendina){
  var f = document.frm;
  f.un_valore.value = tendina.options[tendina.selectedIndex].value;
  f.un_testo.value = tendina.options[tendina.selectedIndex].text;
 }
</SCRIPT>

</head>

<body bgcolor="#ccccee" text="#000000" >
<center>

<?php


echo "





";

echo "<form  method=post action=\"pagina1.php\">";
echo "<select name=\"latendina\" onchange=\"aggiornaHidden(this)\" >";
echo "<OPTION>A</OPTION>";
echo "<OPTION>B</OPTION>";
echo "<OPTION>C</OPTION>";
echo "<OPTION>D</OPTION>";
echo "<OPTION>E</OPTION>";
echo "<OPTION>F</OPTION>";
echo "</select>
";
echo "<input type=submit name=\"pagina1\" value=\"vai alla pagina 1\">";
echo "</form>



";



echo "<form  method=post action=\"pagina2.php\">";
//echo "<select name=\"latendina2\"  >";
//echo "<OPTION>A</OPTION>";
//echo "<OPTION>B</OPTION>";
//echo "<OPTION>C</OPTION>";
//echo "<OPTION>D</OPTION>";
//echo "<OPTION>E</OPTION>";
//echo "<OPTION>F</OPTION>";
//echo "</select>
";


echo "<INPUT TYPE=HIDDEN NAME=\"un_valore\" >";
echo "<INPUT TYPE=HIDDEN NAME=\"un_testo\" >";

echo "<input type=submit name=\"pagina2\" value=\"vai alla pagina 2\">";
echo "</form>



";

?>

</center>
</body>
</html>



codice della pagina (pagina1.php)
codice:
<!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="it" lang="it">

<head>
<title> pagina 1 </title>
</head>

<body bgcolor="#ccccee" text="#000000" >
<center>

<?php

echo "





";



if (empty($_POST["latendina"])) {
    $latendina="";
}else{
    $latendina=$_POST["latendina"];
}

echo "<font face=\"Arial\" size=\"6\">";
echo "Questa &#232; la pagina 1 


";
echo "valore passato = ",$latendina,"
";

echo "</font>";

?>

</center>
</body>
</html>



codice della pagina (pagina2.php)
codice:
<!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="it" lang="it">

<head>
<title> pagina 2 </title>
</head>

<body bgcolor="#ccccee" text="#000000" >
<center>

<?php

echo "





";



if (empty($_POST["un_valore"])) {
    $un_valore="";
}else{
    $un_valore=$_POST["un_valore"];
}

if (empty($_POST[""])) {
    $un_testo="";
}else{
    $un_testo=$_POST["un_testo"];
}

echo "<font face=\"Arial\" size=\"6\">";
echo "Questa &#232; la pagina 2 


";
echo "un_valore = ",$un_valore,"
";
echo "un_testo = ",$un_testo,"
"; //NON FUNZIONA !
echo "</font>";

?>

</center>
</body>
</html>