这样的js怎么搞出来的

Question

<script type="text/javascript"><!--
google_ad_client = "pub-2345";
//180x150, 创建于 07-11-6
google_ad_slot = "4222222";
google_ad_width = 180;
google_ad_height = 150;
//--></script>
<script language="javascript" src="show_ads.js"></script>在ff 下查看源文件出现  <script>google_protectAndRun("ads_core.google_render_ad", google_handleError, google_render_ad);</script><ins style="border: medium none ; margin: 0pt; padding: 0pt; display: inline-table; height: 280px; position: relative; visibility: visible; width: 336px;"><ins style="border: medium none ; margin: 0pt; padding: 0pt; display: block; height: 280px; position: relative; visibility: visible; width: 336px;"><iframe allowtransparency="true" hspace="0" id="google_ads_frame1" marginheight="0" marginwidth="0" name="google_ads_frame" src="http://googleads.g.doubleclick.net/pagead/ads?&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp;dtd=M&amp;xpc=qiAC290Zvp&amp;p=http%3A//sartikakurniali.com" style="left: 0pt; position: absolute; top: 0pt;" vspace="0" frameborder="0" height="280" scrolling="no" width="336"></iframe></ins></ins>这不分代码，如何实现的？