Defaul tLang not getting set in cookie

[MrBaseball34]

syntax error 
extraParams:{ajaxSearch:1,id_lang:}

http://mystore.com/category.php?id_category=39 Line 336

Here's actual code from PS version 1.2.5 blocksearch template:

       $('document').ready( function() {
           $("#search_query").autocomplete(
               '{/literal}{$base_dir}{literal}search.php', {
               minChars: 3,
               max:10,
               width:500,
               scroll: false,
               formatItem:formatSearch,
               extraParams:{ajaxSearch:1,id_lang:{/literal}{$cookie->id_lang}{literal[spam-filter]
           }).result(redirectSearch)
       });

Looks like default lang is not getting set in cookie. Any ideas as to why?