--- uc_attribute_stock_filter.js	2009-04-13 20:35:52.000000000 -0400
+++ uc_attribute_stock_filter.js.patched	2009-04-13 20:33:27.000000000 -0400
@@ -17,6 +17,7 @@ Drupal.behaviors.ucAttributeStockFilter 
 
 function onSelectChange() {
   var parentForm = 'form#'+ $(this).parents('form').get(0).id; // Grab id of parent form tag.
+  var parentNode = parentForm.substr(parentForm.lastIndexOf('-') + 1);
   var parentId = '#'+ $(this).parent().get(0).id; // Grab id of parent of active option
   var selected = $(parentForm +" "+ parentId +" option:selected").val(); // Grab value of selected option
 //  alert(parentId);
@@ -65,8 +66,8 @@ function onSelectChange() {
     .not($(parentForm +" "+ parentId +" option")) // .. excluding the active select box
     .each(function() {
       if (this.value) {
-        if (typeof uc_asf_AvailableOptions[selected] != 'undefined') { // Avoid triggering a JS error
-          if (uc_asf_AvailableOptions[selected].indexOf(this.value) == -1) { // If the option value isn't in the array ...
+        if (typeof uc_asf_AvailableOptions[parentNode][selected] != 'undefined') { // Avoid triggering a JS error
+          if (uc_asf_AvailableOptions[parentNode][selected].indexOf(this.value) == -1) { // If the option value isn't in the array ...
             if ($.browser.msie) {
               $(this).remove(); // IE doesn't allow hide or disable, so remove it
             }