cascading select

[Chris Stinemetz <chrisstinemetz@xxxxxxxxx>]

I am trying to create a cascading seletct with 3 menu choices.
For some reason my third select menu is not populating. It does not
seem like my ajax is correctly sending $_post values to the final
query in my PHP class I built.
By the time I make it to the final (third) select menu there are no choices.

Hopefully someone can find something I missed in the following code snippits.

Any help is greatly appreciated.

Please excuse the incorrect indentions. For some reason gmail changes it.

Thanks,

Chris

ajax code...

   <script>
       $(document).ready(function(){
           $("select#type").attr("disabled","disabled");
                       $("select#store").attr("disabled","disabled");
           $("select#market").change(function(){
           $("select#type").attr("disabled","disabled");
           $("select#type").html("<option>please wait...</option>");
           var id = $("select#market option:selected").attr('value');
           $.post("select_type.php", {id:id}, function(data){
               $("select#type").removeAttr("disabled");
               $("select#type").html(data);
           });
       });

                       $("select#type").change(function(){
                       $("select#store").attr("disabled","disabled");
                       $("select#store").html("<option>please
wait...</option>");
                       var id = $("select#type option:selected").attr('value');
           $.post("select_store.php", {id:id}, function(data){
               $("select#store").removeAttr("disabled");
               $("select#store").html(data);
                       });
               });




       $("form#select_form").submit(function(){
           var market = $("select#market option:selected").attr('value');
           var type = $("select#type option:selected").attr('value');
                       var store = $("select#store
option:selected").attr('value');
           if(market>0 && type>0 && store>0)
           {
               var market = $("select#market option:selected").html();
                               var type = $("select#type
option:selected").html();
                               var store = $("select#store
option:selected").html();
               $("#result").html('your choices were: '+market +' ,
'+type +' and '+store);
           }
           else
           {
               $("#result").html("you must choose three options!");
           }
           return false;
       });
   });
   </script>


php class for populating select menus....

<?php
class SelectList
{
       protected $conn;
               public function __construct()
               {
                       $this->DbConnect();
               }
               protected function DbConnect()
               {
                       include "db_config.php";
                       $this->conn =
mysql_connect($host,$user,$password) OR die("Unable to connect to the
database");
                       mysql_select_db($db,$this->conn) OR die("can
not select the database $db");
                       return TRUE;
               }
               public function ShowMarket()
               {
                       $sql = "SELECT DISTINCT id_markets FROM store_list";
                       $res = mysql_query($sql,$this->conn);
                       $market = '<option value="0">market...</option>';
                       while($row = mysql_fetch_array($res))
                       {
                               $market .= '<option value="' .
$row['id'] . '">' . $row['id_markets'] . '</option>';
                       }
                       return $market;
               }

               public function ShowType()
               {
                       $sql = "SELECT DISTINCT store_type FROM store_list";
                       $res = mysql_query($sql,$this->conn);
                       $type = '<option value="0">store type...</option>';
                       while($row = mysql_fetch_array($res))
                       {
                               $type .= '<option value="' . $row['id']
. '">' . $row['store_type'] . '</option>';
                       }
                       return $type;
               }

               public function ShowStore()
               {
                       $sql = "SELECT store_name FROM store_list WHERE
id_markets=$_POST[id] AND store_type=$_POST[id]";
                       $res = mysql_query($sql,$this->conn);
                       $Store = '<option value="0">stores...</option>';
                       while($row = mysql_fetch_array($res))
                       {
                               $Store .= '<option value="' .
$row['id'] . '">' . $row['store_name'] . '</option>';
                       }
                       return $Store;
               }
}

$opt = new SelectList();

?>

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