I have an auto complete textbox that i would like to populate drop down lists after selecting the item for the text box. Granted i'm sure i can do this by reloading form or something like that but i want to do it much like the auto complete does and just parse the info through a file onBlur.

This code works for the autocomplete but i need to pass the brand_id to the form as well....
function lookup(brand) {
        if(brand.length == 0) {
            // Hide the suggestion box.
        } else {
            // post data to our php processing page and if there is a return greater than zero
            // show the suggestions box
            $.post("brand_search.php", {brand: ""+brand+""}, function(data){ 
                if(data.length > 0) {
    } //end
    // if user clicks a suggestion, fill the text box.
    function fill(thisValue) {
        setTimeout("$('#suggestions').hide();", 200);
    function populate(sub_brand) {
        $.post("sub_brand_search.php", {sub_brand: ""+sub_brand+""}, function(data){
                if(data.length > 0) {
The form as i would like for it to look and operate minus layout.
<form method="post" action"">
<input name="brand" type="text" id="brand" onkeyup="lookup(this.value);" onblur="fill();" size="35" maxlength="45" autocomplete="off">
<div class="suggestionsBox" id="suggestions" style="display: none;">
        <img src="<?=$relative_path?>coupon/style/images/upArrow.png" style="position: relative; top: -18px; left: 30px;" alt="upArrow" />
        <div class="suggestionList" id="autoSuggestionsList"></div>
<input type="checkbox" name="type[]" id="type" value="1">Brand
<input type="checkbox" name="type[]" id="type" value="2" onChange="populate(sub-brand)">Sub-Brand //could even go for something like this... that if once checked then it created a drop-down list but used info coming from text field. 
<input type="checkbox" name="type[]" id="type" value="3">Category
<input type="checkbox" name="type[]" id="type" value="4">Sub-Category
<select name="sub_brand" id="sub_brand">
<option value = "1">list of options</options> <!--query after autocomplete completed and/or checkbox selected-->
<select name="category" id="category">
<option value = "1">list of options</options> <!--query after autocomplete completed and/or checkbox selected and if sub_brand selected change again-->
<select name="sub_category" id="sub_category"> <!--query after autocomplete completed and/or checkbox selected and if category selected change again-->
<option value = "1">list of options</options>
Here you can see the php file i have for the auto complete to see that i want to pull the brand_id to the form as well. I just don't know how to do it...
PHP Code:

<?php    include("session.php"); 
// Check the user has typed something in our input box.
if(isset($_POST['brand'])) {
$mysearchString $_POST['brand'];
// Is the string length greater than 0?
if(strlen($mysearchString) > 0) {
$query $database->query("SELECT `brand`, `brand_id`
FROM `brand`
WHERE brand 
); // limits our results list to 10.
if($query) {

$num_rows mysql_num_rows($query);
for (
$n=0$n<$num_rows$n++) { 
$brand mysql_result($query$n"brand")
$brand_id mysql_result($query$n"brand_id");
'<li onClick="fill(\''.$brand.'\');">'.$brand.'</li>';
} else {
'ERROR: There was a problem with the query.';
} else {
'Access denied.';
sorry for php script it didn't copy across correctly...

**table for sub_brand has brand_id, sub_brand , sub_id
**table for category has brand_id, category, cat_id
**table for sub_category has brand_id, sub_id, sub_category

I know when the brand is pulled from the database i need to pull the brand_id and put it through to the form just like i did with the brand however i don't want this a known but hidden(cookie, session, hidden field). again also i don't want to have to reload the form for each field change...