Drupal Webform JavaScript variable problem

<?php
 
$q25 = array(
0  => 0, 1  => 1, 2  => 2, 3  => 3, 4  => 4, 5  => 5, 6  => 6, 7  => 7, 8  => 8, 9  => 9, 10  => 10, 11  => 11, 12  => 12, 13  => 13, 14  => 14, 15  => 15, 16  => 16, 17  => 17, 18  => 18, 19  => 19, 20  => 20, 21  => 21, 22  => 22, 23  => 23, 24  => 24, 25  => 25, 26  => 26, 27  => 27, 28  => 28, 29  => 29, 30  => 30, 31  => 31, 32  => 32, 33  => 33, 34  => 34, 35  => 35, 36  => 36, 37  => 37, 38  => 38, 39  => 39, 40  => 40, 41  => 41, 42  => 42, 43  => 43, 44  => 44, 45  => 45, 46  => 46, 47  => 47, 48  => 48, 49  => 49, 50  => 50, 51  => 51, 52  => 52, 53  => 53, 54  => 54, 55  => 55, 56  => 56, 57  => 57, 58  => 58, 59  => 59, 60  => 60, 61  => 61, 62  => 62, 63  => 63, 64  => 64, 65  => 65, 66  => 66, 67  => 67, 68  => 68, 69  => 69, 70  => 70, 71  => 71, 72  => 72, 73  => 73, 74  => 74, 75  => 75, 76  => 76, 77  => 77, 78  => 78, 79  => 79, 80  => 80, 81  => 81, 82  => 82, 83  => 83, 84  => 84, 85  => 85, 86  => 86, 87  => 87, 88  => 88, 89  => 89, 90  => 90, 91  => 91, 92  => 92, 93  => 93, 94  => 94, 95  => 95, 96  => 96, 97  => 97, 98  => 98, 99  => 99, 100  => 100);
?>  
<p>What proportion of your customers do you deal with on the following terms:</p>
<?php echo "Payment in advance";
$select = '<select name="1" id="one" size="1" onchange="getValues(1)">'."\r\n";
foreach($q25 as $key => $value){
    $select .= "\t".'<option value="'.$key.'">' . $value.'%</option>'."\r\n";
}
$select .= '</select>';
echo $select;
?>  
<p></p>
<?php echo "Cash on Delivery (COD)";
$select2 = '<select name="2" id="two" size="1" onchange="getValues(2)">'."\r\n";
foreach($q25 as $key => $value){
    $select2 .= "\t".'<option value="'.$key.'">' . $value.'%</option>'."\r\n";
}
$select2 .= '</select>';
echo $select2;
?>  
<p></p>
<?php echo "1-30 day account";
$select3 = '<select name="3" id="three" size="1" onchange="getValues(3)">'."\r\n";
foreach($q25 as $key => $value){
    $select3 .= "\t".'<option value="'.$key.'">' . $value.'%</option>'."\r\n";
}
$select3 .= '</select>';
echo $select3;
?>  
<p></p>
<?php echo "31-60 day account";
$select4 = '<select name="4" id="four" size="1" onchange="getValues(4)">'."\r\n";
foreach($q25 as $key => $value){
    $select4 .= "\t".'<option value="'.$key.'">' . $value.'%</option>'."\r\n";
}
$select4 .= '</select>';
echo $select4;
?>  
<p></p>
<?php echo "61-90 day account";
$select5 = '<select name="5" id="five" size="1" onchange="getValues(5)">'."\r\n";
foreach($q25 as $key => $value){
    $select5 .= "\t".'<option value="'.$key.'">' . $value.'%</option>'."\r\n";
}
$select5 .= '</select>';
echo $select5;
?>  
<p></p>
<?php echo "Other";
$select6 = '<select name="6" id="six" size="1" onchange="getValues(6)">'."\r\n";
foreach($q25 as $key => $value){
    $select6 .= "\t".'<option value="'.$key.'">' . $value.'%</option>'."\r\n";
}
$select6 .= '</select>';
echo $select6;
?>  
<p></p>
<?php echo "";
echo 'Total:
  <input type="text" id="main" style="mainbox"  > 
  %'
?>
                                  

1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
57:
58:
59:
60:
61:
62:
63:
64:
65: