织梦dedecms预防网站里的广告被浏览器阻止的方法

<?php
/**
 *
 * 广告JS调用方式
 *
 * @version        $Id: ad_js.php 1 20:30 2010年7月8日Z tianya $
 * @package        DedeCMS.Site
 * @copyright      Copyright (c) 2007 - 2010, DesDev, Inc.
 * @license        http://help.dedecms.com/usersguide/license.html
 * @link           http://www.dedecms.com
 */
 
if(isset($_GET['arcID'])) $aid = intval($_GET['arcID']);
$arcID = $aid = (isset($_GET['aid']) && is_numeric($_GET['aid'])) ? intval($_GET['aid']) : 0;
if($aid==0) die(' Request Error! ');
 
$cacheFile = '../data/cache/myad-'.$aid.'.htm';
if(file_exists($cacheFile) && filesize($cacheFile) > 100)
{
    echo file_get_contents($cacheFile);
    exit();
}
 
require_once '../include/common.inc.php';
$row = $dsql->GetOne("SELECT * FROM `dede_myad` WHERE aid='$aid' ");
$adbody = '';
if($row['timeset']==0)
{
    $adbody = $row['normbody'];
} else {
    $ntime = time();
    if($ntime > $row['endtime'] || $ntime < $row['starttime'])
    {
        $adbody = $row['expbody'];
    } else {
        $adbody = $row['normbody'];
    }
}
$adbody = str_replace('"', '\"',$adbody);
$adbody = str_replace("\r", "\\r",$adbody);
$adbody = str_replace("\n", "\\n",$adbody);
$adbody = "<!--\r\ndocument.write(\"{$adbody}\");\r\n-->\r\n";
$fp = fopen($cacheFile, 'w');
fwrite($fp, $adbody);
fclose($fp);