smarty查询方法,该如何处理

<form>
    <input type="text" id="t" value="" name="t"/>
	<input type="button"  class="anniu4" value="查询" onclick="window.location='city.php?module=query'"/>
    </form>

<?php
require_once('adminbase.php');
require_once('CityBusiness.php');
//用户管理
$module = $_REQUEST["module"];
$city = new CityBusiness();
if (!isset($module) || $module == "list")
{
	$smarty->assign("pageTitle","城市管理");
	$list = $city->getAllList();
	$smarty->assign("list",$list);
	$smarty->display('admin/city/list.tpl');
}
else if ($module == "query")
{
    
	
	
	$smarty->display('admin/city/query.tpl');
}