dealer ajax search template

<script type="text/javascript">
jQuery(document).ready(function($) {

    dealerResults = function () {
        var county = $('#dealer-county').val(),
            town = $('#dealer-town').val(),
            wp_nonce = '<?php echo wp_create_nonce("dealer_search");?>';
        if(county != 0 && town != 0){
            $.ajax({
                type: 'POST',
                url: '<?php echo admin_url('admin-ajax.php'); ?>',
                data: { varCounty : county, varTown : town, action: 'dealer_search', nonce: wp_nonce },
                success: function(data){
                    $(".dealer-wrapper").remove();
                    $("#dealer-results").append(data);
                }
            });
        }
    }

    var dealer_town = $('#dealer-town').clone(true);
    $('#dealer-county').change(function(){
        var selected_county = $('option:selected',this).val().replace(/ /g,"-");
        if(selected_county != 0){
            var selectedTown = dealer_town.clone(true).find('.default,.'+selected_county);
            $('#dealer-town').removeAttr('disabled');
            $('#dealer-town').empty().append(selectedTown);
        } else {
            $('#dealer-town').attr('disabled','disabled');
        }
    });

    $('#dealer-search').submit(function(e){ // Fire this function some how with the form submission.
        e.preventDefault();
        dealerResults();
    });

});
</script>

<?php
    global $wpdb;
    $all_dealer_region = $dealer_county = $dealer_town = Array();
    $dealer_data = $wpdb->get_results( "SELECT post_id, meta_key, meta_value FROM $wpdb->postmeta WHERE meta_key = 'dealer_county' OR meta_key = 'dealer_town'", ARRAY_A);

    // get all county base on meta_key and associate it with town
    foreach($dealer_data as $d){
      if($d['meta_key'] == 'dealer_county'){
        if(!is_array($all_dealer_region[$d['meta_value']]))
            $all_dealer_region[$d['meta_value']] = array();
        $dealer_county[$d['post_id']] = $d['meta_value'];
      }
      if($d['meta_key'] == 'dealer_town'){
        $dealer_town[$d['post_id']] = $d['meta_value'];
      }
    }
    foreach($dealer_town as $key => $value){
        if( !in_array($value, $all_dealer_region[$dealer_county[$key]]) ){
            $all_dealer_region[$dealer_county[$key]][] = $value;
        }
    }
?>
<div id="dealer-filter">
    <form id="dealer-search" name="dealer-search">
        <select name="dealer-county" id="dealer-county">
            <option class="default" value="0">Choose County</option>
            <?php foreach($all_dealer_region as $key => $value){
                echo "<option value=\"$key\">$key</option>";
            } ?>
        </select>
        <select name="dealer-town" id="dealer-town" class="input-xlarge" disabled="disabled">
            <option class="default" value="0">Choose Town</option>
            <?php foreach($all_dealer_region as $key => $value){
                    usort($value, 'dealer_sort');
                    $county_class = str_replace(' ','-',$key);
                    foreach($value as $town){
                        echo "<option class=\"$county_class\" value=\"$town\">$town</option>";
                    }
            } ?>
        </select>
        <button type="submit" class="btn"><i class="icon-search"></i> Find dealers</button>
    <form>
</div>

<div id="dealer-results">
    <!-- MY DEALER RESULTS WILL APPEAR HERE! -->
</div>