PHP/AJAX dropdown select box not populating

Hey Experts!!

I have 3 drop down select boxes that I received the code from via another expert.  They work great, except I can't get the last one to populate.  I've tested the query several times and the query works just fine.  

I'm not sure if I'm passing the variables correctly or if they're even named correctly.
The last one should populate with an id of model_name and then values of that column.

Here is the page in question: http://aimsmanufacturing.com/dbaxle/start.php 

Here is a page with just the query: http://aimsmanufacturing.com/dbaxle/modelTest.php?models.model_id=3

If you choose a year(1987) and then a model(any one is fine) the 3rd one should come up with a list of results.  I'm coming up empty.

I've attached my code so you can see the AJAX on the back end.

<?php require_once('Connections/dbax.php'); ?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "") 
{
  if (PHP_VERSION < 6) {
    $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
  }

  $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);

  switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;    
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
  }
  return $theValue;
}
}

$colname_rsUser = "-1";
if (isset($_SESSION['MM_username'])) {
  $colname_rsUser = $_SESSION['MM_username'];
}
mysql_select_db($database_dbax, $dbax);
$query_rsUser = sprintf("SELECT username FROM users WHERE username = %s", GetSQLValueString($colname_rsUser, "text"));
$rsUser = mysql_query($query_rsUser, $dbax) or die(mysql_error());
$row_rsUser = mysql_fetch_assoc($rsUser);
$totalRows_rsUser = mysql_num_rows($rsUser);
?>
<?php require_once('includes/head.php'); ?>
<?php require_once('includes/search.php'); ?>
<?php require_once('includes/nav.php'); ?>
 <div class="clear"></div> 
<!-- start content-outer ........................................................................................................................START -->
<div id="content-outer">
<!-- start content -->
<div id="content">


	<!--  start page-heading -->
	<div id="page-heading">
		<h1>Welcome <?php echo $_SESSION['MM_Username']; ?></h1>
	</div>
	<!-- end page-heading -->

	<table border="0" width="100%" cellpadding="0" cellspacing="0" id="content-table">
	<tr>
		<th rowspan="3" class="sized"><img src="images/shared/side_shadowleft.jpg" width="20" height="300" alt="" /></th>
		<th class="topleft"></th>
		<td id="tbl-border-top">&nbsp;</td>
		<th class="topright"></th>
		<th rowspan="3" class="sized"><img src="images/shared/side_shadowright.jpg" width="20" height="300" alt="" /></th>
	</tr>
	<tr>
		<td id="tbl-border-left"></td>
		<td>
		<!--  start content-table-inner ...................................................................... START -->
		<div id="content-table-inner">
		
			<!--  start table-content  --> 
			<div id="table-content">	
				<table border="0" width="100%" cellpadding="0" cellspacing="0" id="product-table">
				<tr>
					<th class="table-header-repeat line-left minwidth-1"><a href="#">Year</a></th>
					<th class="table-header-repeat line-left minwidth-1"><a href="#">Make</a></th>
					<th class="table-header-repeat line-left"><a href="#">Model</a></th>
				</tr>
	</tr>
    <tr>
        <td>	<select  id="year" name="year" disabled="disabled" ></select>   </td> 
        <td><select  id="make" name="make" disabled="disabled"></select></td>  
        <td><select id="model" name="model" disabled="disabled"></select></td>  
    </tr>  
</table>  


			</div>
			<!--  end content-table  -->
		
			<!--  start actions-box ............................................... -->
			<div id="actions-box">
				<a href="" class="action-slider"></a>
				<div id="actions-box-slider">
					<a href="" class="action-edit">Edit</a>
					<a href="" class="action-delete">Delete</a>
				</div>
				<div class="clear"></div>
			</div>
			<!-- end actions-box........... -->			
		</div>
		<!--  end content-table-inner ............................................END  -->
		</td>
		<td id="tbl-border-right"></td>
	</tr>
	<tr>
		<th class="sized bottomleft"></th>
		<td id="tbl-border-bottom">&nbsp;</td>
		<th class="sized bottomright"></th>
	</tr>
	</table>
	<div class="clear">&nbsp;</div>

</div>
<!--  end content -->
<div class="clear">&nbsp;</div>
</div>
<!--  end content-outer........................................................END -->

<div class="clear">&nbsp;</div>
    
<!-- start footer -->         
<div id="footer">
	<!--  start footer-left -->
	<div id="footer-left">
	Intranet Designed &amp; Maintained by: <a href="www.430Designs.com">430Designs </a>
	</div>
	<!--  end footer-left -->
	<div class="clear">&nbsp;</div>
</div>
<!-- end footer -->
<script language="javascript">  
        $(document).ready(function() {  
                  
                $.getJSON("getYears.php", function(data) {  
                        $("#make").html("");  
                        $.map(data, function(e, i) {  
                                $("#year").append("<option value='" + e.value + "' >" + e.text + "</option>").attr("disabled",false);  
                        });  
                });  
                  
                $("#year").change(function() {  
                        $.getJSON("getMakes.php", {"yearID":$(this).val()}, function(data) {  
                                $("#make").html("");  
                                $("#model").html("");  
                                $.map(data, function(e, i) {  
                                        $("#make").append("<option value='" + e.value + "' >" + e.text + "</option>").attr("disabled",false);  
                                });  
                        });  
                });  
  
                $("#make").change(function() {  
                        $.getJSON("getModels.php", {"model_id":$(this).val()}, function(data) {  
                                $("#model").html("");  
                                $.map(data, function(e, i) {  
                                        $("#model").append("<option value='" + e.value + "' >" + e.text + "</option>").attr("disabled",false);  
                                });  
                        });  
                });
//This is the closing bracket
        });  
</script>  

</body>
</html>
<?php
mysql_free_result($rsUser);
?>


<!---------------------------------------------------------------------------------------------

THIS IS THE getModels.php file 

--------------------------------------------------------------------------------------------->
<?php  
    $connect = mysql_connect("lzakoor.db.6428867.hostedresource.com","lzakoor","PAss1234") or die("Connexion error!");  
    mysql_select_db("lzakoor", $connect) or die("Database connexion error!");  
  
	$query = "SELECT * FROM lzakoor.makes, lzakoor.models 
	WHERE makes.make_id = models.make_id 
	AND to_year >=".$_GET["yearID"]. 
	"AND from_year <=".$_GET["yearID"]. 
	"AND make_id = ".$_GET["make_id"];  
    $result = mysql_query($query);  
    $options = array();  
    $options[] = array("value"=>"","text"=>"Choose a model...");  
    if($result) while($row = mysql_fetch_object($result)) $options[] = array("value"=>$row->model_id,"text"=>$row->model_name);  
    print json_encode($options);  
    mysql_close();  
?>

Select allOpen in new window