block->file->activeFileId = $this->block->activeFileId;
// Hidden fields.
$fields = array('name', 'type', 'activeFileId');
foreach ($fields as $field) :
// Don't output until it has a value
// It better for traffic, client side
// should take care of this.
if (!$fieldValue = $this->block->file->$field) {
continue;
}
?>