ajax chained select on main page issue

[neit]

I have been trying to implement a 3 chain select
on the main zen-cart page using ajax.

The script is essentially
blueicestudios.com/chained-select-boxes-using-php-mysql-ajax/

with php and mysql modifications made to meet my requirements.

I put the following code in the template html_header.php page
between the head tags.

<?php include('func.php'); ?>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>

<script type="text/javascript">
$(document).ready(function() {
	$('#wait_1').hide();
	$('#drop_1').change(function(){
	  $('#wait_1').show();
	  $('#result_1').hide();
	  $('#result_2').hide();
      $.get("func.php", {
		func: "drop_1",
		drop_var: $('#drop_1').val()
      }, function(response){
        $('#result_1').fadeOut();
        setTimeout("finishAjax('result_1', '"+escape(response)+"')", 400);
      });
    	return false;
	});
});

function finishAjax(id, response) {
  $('#wait_1').hide();
  $('#'+id).html(unescape(response));
  $('#'+id).fadeIn();
}
function finishAjax_tier_three(id, response) {
  $('#wait_2').hide();
  $('#'+id).html(unescape(response));
  $('#'+id).fadeIn();
}
</script>

I then put

<form action="test.php" method="get">
  
    <select name="drop_1" id="drop_1">
    
      <option value="" selected="selected" disabled="disabled">Select a Category</option>
      
      <?php getTierOne(); ?>
    
    </select> 
    
    <span id="wait_1" style="display: none;">
    <img alt="Please Wait" src="ajax-loader.gif"/>
    </span>
    <span id="result_1" style="display: none;"></span>
    <span id="wait_2" style="display: none;">
    <img alt="Please Wait" src="ajax-loader.gif"/>
    </span>
    <span id="result_2" style="display: none;"></span> 
  
</form>

I place the func.php in my zen-cart folder root.

When I try to load view the page it appears to stop when
it tries to stop executing at the getTierOne(); as nothing appears after that and hen I comment out that line all the usuall zen-cart
links etc.. load. The func.php files contain the sql to out the new select menus.

I think the issue I am having my be related to the func.php location on the server to where the function executes in the main page.

[neit]

Issue resolved