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