Js non va. Secondo voi perché?

codice:
<script language=\"JavaScript\">
<!--
function LoadInfo(selectVal)
{
  var myForm = document.testform;
  myForm.company = myForm.getElementsById(selectVal+ '_company').value;
  myForm.id = myForm.getElementsById(selectVal+ '_company').value;
  myForm.addres = myForm.getElementsById(selectVal + '_company').value;
}
-->
</script>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>
<form name="testform" onSubmit="return false;" method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
<table width="497" border="1" align="center"
cellpadding="2" cellspacing="1" bordercolor="#0000FF"
bgcolor="#99CCFF" rules="none">
<tr align="center" valign="middle">
<td width="240">Descrizione</td>
<td width="240">Codice</td>
</tr>
<tr align="center" valign="middle">
<td>
<?php
$query_01 = "SELECT * FROM MANODOPERA;";
$result = mysql_query($query_01,$link);
while($row = mysql_fetch_array($result)){
$desman = $row['DESMAN'];
echo "<input type=\"hidden\" name=\"".$row["CODMAN"]."_company\" value=\"".$row["DESMAN"]."\">\n";
echo "<input type=\"hidden\" name=\"".$row["CODMAN"]."_company\" value=\"".$row["UNIMISMAN"]."\">\n";
echo "<input type=\"hidden\" name=\"".$row["CODMAN"]."_company\" value=\"".$row["COSMAN"]."\">\n";
echo "<input type=\"hidden\" name=\"".$row["CODMAN"]."_company\" value=\"".$row["AGGMAN"]."\">\n";
$option .="<option value=\"$desman\">$desman</option>";
}
 echo"<select name=\"descrizione\" onChange=\"LoadInfo(this.selectedIndex.value);\" size=\"10\">";
echo $option;
?>
</select>
</td>
<?
$aux=$_POST["DESMAN"];
include("data.txt");
$link=mysql_connect("$db_host","$db_login","$db_pass");
@mysql_select_db( "$database")
or die( "Impossibile trovare il DB $database");
$sql = "SELECT * FROM MANODOPERA WHERE DESMAN=\"$aux\"";
$result = mysql_query($sql) or die ("Couldn't Execute Query");
while ($row = mysql_fetch_array($result)) {
$id = $row['CODMAN'];
$company = $row['DESMAN'];
$user = $row['UNIMISMAN'];
$addres = $row['COSMAN'];
$zip = $row['AGGMAN'];
}
?>
<TD>
<INPUT TYPE="text" SIZE=20 NAME="PHONE" VALUE="<?echo $id;?>"></td>
</tr>
</table>
</form>
</body>
</html>