public function columns($Name = '')
{
if (strlen($Name) > 0) {
if (array_key_exists($Name, $this->_Columns)) {
return $this->_Columns[$Name];
} else {
foreach ($this->_Columns as $ColName => $Def) {
if (strcasecmp($Name, $ColName) == 0) {
return $Def;
}
}
return null;
}
}
return $this->_Columns;
}