function db_getMax($sField, $sTable, $sWhere = "") {
	global $dbLink;
	$query  = "SELECT Max(".$sField.") as nMax FROM ".$sTable;
	if($sWhere!="") $query .= " WHERE ".$sWhere;
	$result = mysql_query($query, $dbLink);
	$line   = mysql_fetch_array($result, MYSQL_ASSOC);
	$nMax   = intval($line["nMax"]);
	mysql_free_result($result);
	return $nMax;
}