php อยากทราบว่า dropdownlist สามารถกำหนดค่า default ให้เลือกไว้ได้ไหมค่ะ

<?php
$host = "localhost";
$database = "db";
$username = "root";
$password = "1234";
$connect = mysql_connect($host, $username, $password) or trigger_error(mysql_error(),E_USER_ERROR); 

mysql_select_db($database, $connect_mk);
$sql = "SELECT name,surname,sex_id, FROM person LIMIT 1";
$result = mysql_query( $sql, $connect);
$fd = mysql_fetch_array($result);
?>

<select name="select_sex">
<option value="">- เลือกเพศ -</option>
	<?php
		mysql_select_db($database, $connect_mk);
		$sql = "SELECT sex_id,sex_name FROM sex";
		$result = mysql_query( $sql, $connect);
		while ($rs = mysql_fetch_array($result))
			{	
					if  ($rs['sex_id'] == $fd['sex_id'])
				echo "<option value=\"$rs[sex_id]\" selected>$rs[sex_name]</option>\n";
					else
				echo "<option value=\"$rs[sex_id]\">$rs[sex_name]</option>\n";
			}
	?>
</select>

  <select name="lmName1">
	<option value=""><-- Please Select Item --></option>
	<?
	$strSQL = "SELECT * FROM customer ORDER BY CustomerID ASC";
	$objQuery = mysql_query($strSQL);
	while($objResuut = mysql_fetch_array($objQuery))
	{
		if($strDefault == $objResuut["CustomerID"])
		{
			$sel = "selected";
		}
		else
		{
			$sel = "";
		}
	?>
	<option value="<?=$objResuut["CustomerID"];?>" <?=$sel;?>><?=$objResuut["CustomerID"]." - ".$objResuut["Name"];?></option>
	<?
	}
	?>
  </select>