OpenCart 1.5.x.x ajax随机值

Question

I have dynamic block with show and hide products from table on random sort. But when the cash page is active, this part of page stom showing products and show only first product from query ... i do not understand how can i make it work with this effect and show 10 product on random soring ... the query

$sql = "SELECT * FROM " . DB_PREFIX . "product";
$sql .= " WHERE sp_id = ".$id." AND show=1";
$sql .= " ORDER BY shop_id  asc";
$query = $this->db->query($sql);

return $query->row;

and part with ajax :

 <div id="content" class="group">
   <div id="backItem">
     <div id="footerItemContent">
     </div>
     <div id="footerItemDivider">-</div>
       <div id="footerItemCustomer">...</div>
       </div>
     </div>
   </div>
</div>

and my function

    $(document).ready(function() {
var products = function() {

    for ( var i = 0; i < complex.length; i++ ) {
        var name = complex[i]['pr_name'];
        var desc = complex[i]['pr_text'];
    }

var i = 0;
var fnchange = function() {
    $('#footerItemContent').animate({'opacity': 0}, 2000, function () {
        $(this).text(desc);
    }).animate({'opacity': 1}, 2500);
    $('#footerItemCustomer').animate({'opacity': 0}, 2000, function () {
        $(this).text(name);
    }).animate({'opacity': 1}, 2500);
    if( ++i < json.length ){
        setTimeout(fnchange, 10000);
    } else {
        i = 0;
        setTimeout(fnchange, 10000);
    }
};
setTimeout(fnchange, 1);
};
setTimeout(feedbacks,1);