function addData($cdata)
{
if (!isset($this->data[$this->row])) {
$this->data[$this->row] = array();
}
if (!isset($this->data[$this->row][$this->current_field])) {
$this->data[$this->row][$this->current_field] = '';
}
$this->data[$this->row][$this->current_field] .= $cdata;
}