Grazie per l'attenzione alla mia questione
..ho provato a mettere la virgola

$table = new HTML_Table('width="100%"','background="images/sfondo.jpg"');

però ora non mi dà nessun errore..ma non viene applicato nessun sfondo

come posso fare per risolvere questo problema?
questo è il codice della pagina

<?php if( !defined( '_VALID_MOS' ) && !defined( '_JEXEC' ) ) die( 'Direct Access to '.basename(__FILE__).' is not allowed.' );

mm_showMyFileName(__FILE__); ?>



<?php echo $buttons_header // The PDF, Email and Print buttons ?>

<?php echo $browsepage_header // The heading, the category description ?>

<?php echo $parameter_form // The Parameter search form ?>

<?php echo $orderby_form // The sort-by, order-by form PLUS top page navigation ?>



<?php

$data =array(); // Holds the rows of products

$i = 1; $row = 0; // Counters



// Table header

$tableheader[] = $VM_LANG->_('PHPSHOP_CART_NAME');

$tableheader[] = $VM_LANG->_('PHPSHOP_CART_SKU');

if( _SHOW_PRICES && $auth['show_prices'] ) {

$tableheader[] = $VM_LANG->_('PHPSHOP_CART_PRICE');

}

$tableheader[] = $VM_LANG->_('PHPSHOP_PRODUCT_FORM_THUMB_IMAGE');

$tableheader[] = $VM_LANG->_('PHPSHOP_PRODUCT_DESC_TITLE');

if( _SHOW_PRICES && $auth['show_prices'] && USE_AS_CATALOGUE != '1' ) {

$tableheader[] = $VM_LANG->_('PHPSHOP_CART_ACTION');

}



// Creates a new HTML_Table object that will help us

// to build a table holding all the products

$table = new HTML_Table('width="100%"','background="images/sfondo.jpg"');



//$table->addRow( $tableheader, 'class="sectiontableheader"', 'th', true );



foreach( $products as $product ) {



foreach( $product as $attr => $val ) {

// Using this we make all the variables available in the template

// translated example: $this->set( 'product_name', $product_name );

$this->set( $attr, $val );

}



// $data[$row][] = ' '.$product['product_name'].'';
$data[$row][] = $product['product_sku'];
//if( _SHOW_PRICES && $auth['show_prices'] ) {
// $data[$row][] = $product['product_price'];
//}
$data[$row][] = '<a href="'.$product['product_flypage'].'" title="'.$product['product_name'].'">'
. ps_product::image_tag( $product['product_thumb_image'] )
. '</a>';
$data[$row][] = ''.$product['product_name'].'' .'

'
.$product['product_s_desc'] .''; //.$product['product_details'].'';
if( _SHOW_PRICES && $auth['show_prices'] ) {
$data[$row][] = $product['product_price'];
}
if( $product['has_addtocart'] ) {
$data[$row][] = $product['form_addtocart'];
}
else {
//$data[$row][] = '<a href="'.$product['product_flypage'].'" title="'.$product['product_name'].'">'
// . $product['product_details']
// . '</a>';
}
$row++;

}






// Loop through each row and build the table

foreach($data as $key => $value) {



$table->addRow( $data[$key], 'class="sectiontableentry'.$i.'"', 'td', true );

$i = $i == 1 ? 2 : 1;

}

// Display the table

echo $table->toHtml();

?>

<br class="clr" />


<?php echo $browsepage_footer ?>

<?php

// Show Featured Products

if( $this->get_cfg( 'showFeatured', 1 )) {

/* featuredproducts(random, no_of_products,category_based) no_of_products 0 = all else numeric amount

edit featuredproduct.tpl.php to edit layout */

echo $ps_product->featuredProducts(true,10,true);

} ?>

<?php echo $recent_products ?>