My Ajax button doesn't work everytime...why?

[cyberspiritual]

Hi Guys...!

 

I need help .

 

I have an Oscommerce shop and have installed 2 Ajax contribution. (Ajax add to shopping cart & Ajax Shopping cart)

 

But now I want to be able to put on the product page a message like:

You have currently XXX units of this item in your shopping cart.

 

But I have a problem, my ajax code doesn't always follow the shopping cart number.

Take a look:

http://www.khe  opsinternational.ca/catalog/product_info.php?products_id=1036 (remove the space)

 

Can you please help me...many thank's

 

Here's my javascript:

<script type="text/javascript" src="prototype.js"></script>
      <script>

         function sendRequest() {
            new Ajax.Request("qtydanscart.php?superid=<?php echo $superid ?>", 
               { 
               onComplete: showResponse 
               });
            }


         function showResponse(req){
            $('show').innerHTML= req.responseText;
         }

      </script>

 

Here's by button code:

// Output a form
  function tep_draw_form($name, $action, $method = 'post', $parameters = '') {
    $form = '<form name="' . tep_output_string($name) . '" action="' . tep_output_string($action) . '" method="' . tep_output_string($method) . '"';

    if (tep_not_null($parameters)) $form .= ' ' . $parameters;
// AJAX Addto shopping_cart - Begin
    if( preg_match("/add_product/i", $action) ){
      $form .= ' onSubmit="doAddProduct(this); sendRequest(); return false;"';
    }
  // AJAX Addto shopping_cart - End
    $form .= '>';

    return $form;
  }

 

Here's my "DIV":

<div id="show">
<?php 
$superid = $product_info['products_id'];
$products = $cart->get_products();
for ($i=0, $n=sizeof($products); $i<$n; $i++) {
if ($products[$i]['id'] == $superid) {
$qtyincart = $products[$i]['quantity'];
echo"<b>$qtyincart</b> units in cart.    ";
break;
}
}?></div>

 

and here's my PHP (qtydanscart.php):

<?php
require('includes/application_top.php');

$superid = $_GET['superid'];
$products = $cart->get_products();
for ($i=0, $n=sizeof($products); $i<$n; $i++) {
if ($products[$i]['id'] == $superid) {
$qtyincart = $products[$i]['quantity'];
echo"<b>$qtyincart</b> units in cart.    ";
break;
}
}
?>

 

Thank's

 

 

So,