****พี่ๆสุดหล่อ ช่วยด้วยค้า**** break; default : mainpage(); } ได้ Fatal error: Call to undefined function add_member()

<?php
					//=============== Function ในการเลือกข้อมูล ==================		
							function select($table,$condition)
							{
				
										$sql = "select * from $table $condition";
										//echo $sql;
										$dbquery = mysql_query($sql);
										$result= mysql_fetch_array($dbquery);
										return $result;
							}
?>

<?php
include("../include/function.php");

$row_rsCar=select("agent","where 1=1 and Agent_ID='".$_GET["agentid"]."'");
?>