php drop down list โชว์รายละเอียดข้อมูลจาก database

<?php
include("mysql_connect.php"); //include ไฟล์เชื่อมต่อฐานข้อมูล
$sql ="SELECT mytalbename FROM tb_name";
$query = mysql_query($sql);
echo "<select name=\"selectname\">";
while($rs = mysql_fetch_array($query)){
echo "<option value="<?$rs['value']?>">".$rs['value']."</option>";

}
echo "</select>";
?>

<?php
$id = isset($_GET["id"])?$_GET["id"] : 0;
?>
<select name='ddl'>
<option value="0">--SELECT--</option>
<?php
	$sql="	SELECT id, name FROM tb_name ";
	$qr = mysql_query($sql) or die (mysql_error());
	while($rs = mysql_fetch_assoc($qr)) {
	
		if($q == $rs["id"]) {
			$sel ="selected";
		}else {
			$sel ="";
		}
?>
	<option value="<?php echo $rs["id"];?>" <?php echo $sel;?>><?php echo $rs["name"];?></option>
<?php
	}
?>
</select>