所用到的js脚本：
<script type="text/javascript">
document.getElementsByTagName("iframe")[0].src="replace.php?"+document.getElementsByTagName("iframe")[0].src;
</script>
replace.php代码：
<?php
$site=$_SERVER[&39;QUERY_STRING&39;];
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, $site);
$content = curl_exec ($ch);
curl_close ($ch);
$content=str_replace("browser","酒鬼到此一游",$content);
//将iframe对方页面的browser替换为酒鬼到此一游
echo $content;
exit;