public function getByCategory($imgcat_id, $start = 0, $limit = 0, $asobject = true)
{
$criteria = new CriteriaCompo();
$criteria->add(new Criteria('imgcat_id', $imgcat_id));
$criteria->setSort('image_weight');
$criteria->setOrder('ASC');
$criteria->setStart($start);
$criteria->setLimit($limit);
return parent::getObjects($criteria, null, $asobject);
}