info script php

[jepers75]

Ciao,
volevo capire insieme a voi come mai questa parte di programma non va bene con IE9
con opera, chrome, mozilla, IE7,IE8 va bene.

<?php 
$nu_sc = 1; 
echo '<table id="mytable">'; 
echo '<thead>'; 
echo '<tr>'; 
echo '<th colspan="5" class="head_table">Schedina Integrale</th>'; 
echo '</tr>'; 
echo '<tr>'; 
echo '<th colspan="5" class="head_table"><hr align="center" size="1" width="90%"></th>'; echo '</tr>'; 
echo '<tr>'; 
foreach($ars as $va){ 
$asc=explode('|',$va);
 $c1=$asc[0];
 $c2=$asc[1];
$c3=$asc[2]; 
$c4=$asc[3]; 
$c5=$asc[4]; 
$c6=$asc[5]; 
echo '<th colspan="2" class="head_tb">'.$c1.'</th>'; 
//echo '<th colspan="1" class="head_tb">'.$c2.'</th>';
 // echo '<th colspan="1" class="head_tb">'.$c3.'</th>'; 
echo '<th colspan="2" class="head_tb">'.$c5.'</th>'; 
echo '<th colspan="1" class="head_tb">'.$c6.'</th>'; 
echo '</tr>';
 echo '<tr>';
 echo '<th colspan="4" class="head_tb">'.$c4.'</th>'; 
echo '<th colspan="1" class="head_tb"> <form action="" method="POST" name="frmMain" OnSubmit="return chkSubmit();"> <select class="button" name="T'.$nu_sc.'"> <option value="S">SI</option><option value="N">NO</option></select> <script language="JavaScript">function chkSubmit(){if(isNaN(document.frmMain.quo.value)) {alert("Please... inserire solo numeri. Es. 2.4");return false;}}</script>
</th>'; 
echo '</tr>'; 
$sa = $_POST['T'.$nu_sc]; 
$ars_t[$nu_sc] = $c1.'|'.$c2.'|'.$c3.'|'.$c4.'|'.$c5.'|'.$c6.'|'.$sa; 
$nu_sc++; 
}
 echo '<tr>'; echo '<th colspan="5" class="head_table"><hr align="center" size="1" width="90%"></th>'; 
echo '</tr>';
 echo '<tr>';
 echo '<th colspan="5" class="head_table">Importo <input class="button" type="text" title="Importo " name ="quo" value="2" size="3">
</ br></th>';
 echo '</tr>'; 
echo '<tr>';
 echo '<th class="button" class="head_table">[url="q_1.php"]Back[/url]</th>'; 
echo '<th class="button" class="head_table">Stampa</th>'; 
echo '<th class="head_table"><input class="button" title="Test" type="submit" value="Test" name="tasto" /></th>';
 echo '<th class="button" class="head_table">[url="q_1.php?action=elimina"]home[/url]</th>';
 echo '<th class="button" class="head_table">Salva</th>';
 echo '</tr>';
 echo '</form>'; 
echo '</thead>'; 
echo '</table>'; 
?>

lo javascript serve per un controllo su un input numerico

non riesco a venirne fuori

qualche suggerimento??

Grazie