有一种将单词"<script"分为两部分的技术，例如"<scr"和"ipt".

There is a technique to split the word "<script" into two parts such as "<scr" and "ipt" .

 document.write("<scr"+"ipt src....></scr"+"ipt>");

您的代码可以这样:

<script src="http://ad.reklamport.com/scripts/rp.js" type="text/javascript"></script>
<script type="text/javascript">
    document.write("<scr"+"ipt src='http://ad.reklamport.com/rpgetad.ashx?tt=t_canvecan_anasayfa_300x250&ciid=&rnd="+Math.random()%99999999+"'></"+"scr"+"ipt>");
</script>