select language -- selection not displayed

I have a page where the language selection is done via include files.
The language cannot be selected in the web page.

1. language list script
-----------------
      //this file indicates listing of all available languages

class Language
{
      var $description; //language name
      var $filename; //language PHP constants file
      var $template; //template filename
}

      //a list of languages
      $lang_list = array();

      //to add new languages add similiar structures

      $lang_list[0] = new Language();
      $lang_list[0]->description = "English";
      $lang_list[0]->filename = "english.php";
      $lang_list[0]->template_path = "./templates/tmpl1/";

             $lang_list[0] = new Language();
      $lang_list[0]->description = "Chinese";
      $lang_list[0]->filename = "chinese.php";
      $lang_list[0]->template_path = "./templates/tmpl1/";

?>
---------------
2. Language file code for inclusion:
------------------
{* language selection form *}

{if $lang_list_count > 1}

      {section name=i loop=$lang_list}
      {if $smarty.section.i.index > 0}<font class="lightsmall">/</font> {/if}
      <a class="lightsmall" href="javascript:document.lang_form.new_language.value={$smarty.section.i.index};document.lang_form.submit();">{$lang_list[i]->description}</a>
      {/section}

      <form name="lang_form" method="post" action="index.php">
      <input type="hidden" name="new_language">
        </form>

{/if}
--------------------------------------------
3. Code used in HTML page for inclusion:

                 {include file="language.tpl.html"}


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