Index: branches/version-2_12-dev/data/Smarty/templates/default/products/list.tpl
===================================================================
--- branches/version-2_12-dev/data/Smarty/templates/default/products/list.tpl	(revision 22014)
+++ branches/version-2_12-dev/data/Smarty/templates/default/products/list.tpl	(revision 22017)
@@ -50,10 +50,10 @@
         $.each(hiddenValues, function(){
             // 商品別のフォームに検索条件の値があれば上書き
-            if (cartForm.has('input[name='+this+']')) {
+            if (cartForm.has('input[name='+this+']').length != 0) {
                 cartForm.find('input[name='+this+']').val(searchForm.find('input[name='+this+']').val());
             }
             // なければ追加
             else {
-                cartForm.append($("<input/>").attr("name", this).val(searchForm.find('input[name='+this+']').val()));
+                cartForm.append($('<input type="hidden" />').attr("name", this).val(searchForm.find('input[name='+this+']').val()));
             }
         });