Best Seller product magento

<?php
$storeId = Mage::app()->getStore()->getId();
 $products = Mage::getResourceModel('reports/product_collection')
            ->addOrderedQty()
            ->addAttributeToSelect('*')
            ->addAttributeToSelect(array('name', 'price', 'small_image'))
            ->setStoreId($storeId)
            ->addStoreFilter($storeId)
            ->setOrder('ordered_qty', 'desc');
   
     Mage::getSingleton('catalog/product_status')->addVisibleFilterToCollection($products);
       Mage::getSingleton('catalog/product_visibility')->addVisibleInCatalogFilterToCollection($products);
     
       if($categoryId=$this->getData('category_id')){
            $category = Mage::getModel('catalog/category')->load($categoryId);
            $products->addCategoryFilter($category);
      }
 
   //$products->setPageSize(5)->setCurPage(1); // change the Page Size to how many products you want to show per category

     $this->setProductCollection($products);        
           
?>



<?php if (($_products = $this->getProductCollection())): ?>
<div class="page-title">
    <h2><?php echo $this->__('Our Top Selling Product') ?></h2>
</div>

<div class="top-products owl-carousel">
  <?php foreach ($_products->getItems() as $_product): ?>  
    <div>
      <a href="<?php echo $_product->getProductUrl() ?>" title="<?php echo $this->stripTags($this->getImageLabel($_product, 'small_image'), null, true) ?>" class="product-image"><img src="<?php echo $this->helper('catalog/image')->init($_product, 'small_image')->resize(300); ?>" width="300" height="300" alt="<?php echo $this->stripTags($this->getImageLabel($_product, 'small_image'), null, true) ?>" /></a>
             
    </div>
  <?php endforeach; ?>
</div>

<?php endif; ?>