Ajax ajouter au panier n'est pas d'ajouter des produits au panier

*Ajax ajouter au panier n'est pas mise à jour le produit à votre panier lors de l'action onclick checkout/continuer dans la fenêtre contextuelle, puis il redirige vers l'URL http://hostip.com/checkout/cart/ *

J'avais utilisé cette JavaScript

    <script type="text/javascript">
function setAjaxData(data,iframe){
if(data.status == 'ERROR'){
alert(data.message);
}else{
if(jQuery('.block-cart')){
jQuery('.block-cart').replaceWith(data.sidebar);
}
//           if(jQuery('.header .links')){
//               jQuery('.header .links').replaceWith(data.toplink);
//           }
if(jQuery('.cart-top-container')){
//jQuery('.cart-top-container').empty();
jQuery('.cart-top-container').replaceWith(data.toplink);
}
var targetUrl='<?php echo Mage::getUrl('onestepcheckout') ?>';
jQuery( "#dialog-confirm" ).dialog({
resizable: false,
//height:140,
modal: true,
buttons: {
"Checkout": function() {
window.location.href = targetUrl;
//jQuery(this).dialog( "close" );
},
"Continue Shopping": function() {
jQuery(this).dialog( "close" );
}
}
});
}
}
function setLocationAjax(url,id){
url += 'isAjax/1';
url = url.replace("checkout/cart","ajax/index");
jQuery('#ajax_loader'+id).show();
try {
jQuery.ajax( {
url : url,
dataType : 'json',
success : function(data) {
jQuery('#ajax_loader'+id).hide();
setAjaxData(data,false);          
}
});
} catch (e) {
}
}
</script>
*The form to submit is*
<form action="<?php echo $this->getSubmitUrl($p) ?>" method="post" id="product_addtocart_form"<?php if ($p->getOptions()): ?> enctype="multipart/form-data"<?php endif; ?>>
<div class="home-prouduct-details">
<?php $pid = $p->getId(); ?>
<?php $prod = Mage::getModel('catalog/product')->load($pid);  ?>
<?php $html= $prod->getShortDescription(); ?>
<?php                          
$str = $html;
$matches = array();
preg_match_all('#<div[^>]*>(.*?)</div>#', $str, $matches);
//                              print_r($matches[1][0]);
?>
<a class="prod-name" href="<?php echo $prod->getProductUrl(); ?>"><?php echo $prod->getName(); ?></a>
<div class="prod-img">
<a href="<?php echo $prod->getProductUrl() ?>" title="<?php echo $this->stripTags($this->getImageLabel($prod, 'small_image'), null, true) ?>" class="product-image">
<img src="<?php echo $this->helper('catalog/image')->init($prod, 'small_image')->resize(285,172); ?>" width="285" height="175" alt="<?php echo $this->stripTags($this->getImageLabel($prod, 'small_image'), null, true) ?>" />
</a>
</div>
<div class="home-price-button">
<?php $almost_gone_qty=$this->htmlEscape($prod->getData('almost_gone_qty')); ?>
<?php $qtyStock = Mage::getModel('cataloginventory/stock_item')->loadByProduct($prod)->getQty(); ?>
<?php if (!$this->hasOptions() && strtotime($prod->getDealEndDate())>= Mage::getModel('core/date')->timestamp(time())):?>
<div style="clear:both;"></div>
<div class="add-to-box">
<?php if($prod->isSaleable() && $qtyStock > $almost_gone_qty){ ?>
<p class="availability out-of-stock">
<a onclick="setLocationAjax('<?php echo Mage::helper('checkout/cart')->getAddUrl($prod); ?>',<?php echo $prod->getId();?>)" title="Add To Cart">
<img src="<?php echo $this->getSkinUrl('images/steamy.png'); ?>" title="Add To Cart" alt="Add To Cart" width="285" />
</a>
</p>
<?php } else if($qtyStock <= $almost_gone_qty && $qtyStock!=0){?>
<p class="availability out-of-stock">
<a onclick="setLocationAjax('<?php echo Mage::helper('checkout/cart')->getAddUrl($prod); ?>',<?php echo $prod->getId();?>)" title="Almost Gone">
<img src="<?php echo $this->getSkinUrl('images/almostgone.png'); ?>" title="Almost Gone" alt="Almost Gone" width="285" />
</a>
</p>
<?php } else{ ?>
<p class="availability out-of-stock">
<a href="<?php echo Mage::getBaseUrl(); ?>sold-out" title="Sold Out">
<img src="<?php echo $this->getSkinUrl('images/soldout.png'); ?>" width="285" /><?php //echo $this->__('Out of stock') ?>
</a>
</p>
<?php } ?>
<span id='ajax_loader<?php echo $prod->getId()?>' style='text-align: center; display:none'><img src='<?php echo $this->getSkinUrl('images/opc-ajax-loader.gif')?>'/></span>
</div>                                    
<?php else : ?>
<p class="deal-has-ended">
<a href="<?php echo Mage::getBaseUrl(); ?>sold-out" title="Sold Out">
<img src="<?php echo $this->getSkinUrl('images/deal_ended.png'); ?>" width="285" />
</a>
</p>                                
<?php endif; ?>
<?php echo $this->getChildHtml('addto') ?>
<?php //echo $this->getChildHtml('extra_buttons') ?>
</div>
<div class="home-price">
<div class="home-prices">
<?php 
echo Mage::helper('core')->currency($prod->getPrice());
?>    
</div>
<?php if($matches[1][1] !=""){ ?>
<div class="home-save">
<?php
$savings = $matches[1][1];
$savings = str_ireplace('Rs.', '&#8377;', $savings);
$savings = str_ireplace('Rs', '&#8377;', $savings);
echo $savings;
?>
<?php //print_r($matches[1][1]); ?>
<div class="home-saver">
savings
</div>
</div>
<?php } ?>
<div class="deal-endtime"> 
<?php 
echo "<div id='cdcontainer_".$prod->getId()."' class='cdcontainer'></div>";
$dealEndDate = $prod->getDealEndDate();
$dealEndDateParts = explode(" ", $dealEndDate);
$targetDateParts = explode("-", $dealEndDateParts[0]);
$year = $targetDateParts[0];
$month = $targetDateParts[1];
$date = $targetDateParts[2];
$month_array = array(
"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"
);
$month = $month_array[$month-1];
$targetDate = "$month $date, $year ".$dealEndDateParts[1];
$timer_text = Mage::getStoreConfig('homedeals/basic_settings/cd_display_text');
$timer_end_text = Mage::getStoreConfig('homedeals/basic_settings/cd_end_text');     
//echo $timer_end_text;
//echo date("Y-m-d H:i:s"); echo "<br/>";
//echo $dealEndDate;
if($dealEndDate <= date("Y-m-d H:i:s")){
?>
<script type="text/javascript">
var launchdate_<?php echo $prod->getId(); ?>=new cdLocalTime("cdcontainer_<?php echo $_product->getId(); ?>", "server-php", 0, "", "", "<?php echo '<span><h1 style=color:red;>Deal has ended - 00:00:00</h1></span>' ?><?php //echo $timer_text; ?>", "<?php echo $timer_end_text; ?>", "<?php echo $prod->getId(); ?>");
launchdate_<?php echo $prod->getId(); ?>.displaycountdown("hours", formatresults2);
</script>
<?php   }else { ?>
<script type="text/javascript">
var launchdate_<?php echo $prod->getId(); ?>=new cdLocalTime("cdcontainer_<?php echo $prod->getId(); ?>", "server-php", 0, "<?php echo $targetDate?>", "<?php print date("F d, Y H:i:s", Mage::getModel('core/date')->timestamp(time()))?>", "<?php echo $timer_text; ?>", "<?php echo $timer_end_text; ?>", "<?php echo $prod->getId(); ?>");
launchdate_<?php echo $prod->getId(); ?>.displaycountdown("hours", formatresults2);
</script>
<?php } ?>
</div>
</div>
</div>
<div id="dialog-confirm" style="display:none;">
<?php echo $prod->getName();?> added to your cart Successfully.
</div>
</form>