<div class="cart">
        <script type="text/javascript">
            var yaGoalParams = {
                product_id: "<?php echo $product_id; ?>", 
                name: "<?php echo $model; ?>", 
                price: <?php echo $price_num; ?>,
                quantity: 1
            };
        </script>
        <div><?php echo $text_qty; ?>
          <input type="text" name="quantity" size="2" value="<?php echo $minimum; ?>" />
          <input type="hidden" name="product_id" size="2" value="<?php echo $product_id; ?>" />
           <input type="button" onclick="yaCounter16843852.reachGoal('to_cart_product', yaGoalParams); return true;" value="<?php echo $button_cart; ?>" id="button-cart" class="button" />
          </div>
        <div><span>   <?php echo $text_or; ?>   </span></div>
        <div><a onclick="addToWishList('<?php echo $product_id; ?>');"><?php echo $button_wishlist; ?></a><br />
          <a onclick="addToCompare('<?php echo $product_id; ?>');"><?php echo $button_compare; ?></a></div>
        <?php if ($minimum > 1) { ?>
        <div class="minimum"><?php echo $text_minimum; ?></div>
        <?php } ?>
      </div>

<script type="text/javascript"><!--
$('#button-cart').bind('click', function() {
    $.ajax({
    ... // тут штатный обработчик добавления в корзину
    });
    
    var yaGoalParams = {
        product_id: "<?php echo $product_id; ?>", 
        name: "<?php echo $model; ?>", 
        price: <?php echo $price_num; ?>,
        quantity: $('.product-info input[type=\'text\']').val() 
    };
    yaCounter16843852.reachGoal('to_cart_product', yaGoalParams);
});
//--></script>