Fckeditor and Google Adsense

online demo

<!-- AddThis Button BEGIN -->
<script type="text/javascript">var addthis_pub="haddthis";</script>
<a href="http://www.addthis.com/bookmark.php?v=20" onmouseover="return addthis_open(this, '', '[URL]', '[TITLE]')" onmouseout="addthis_close()" onclick="return addthis_sendto()"><img src="http://s7.addthis.com/static/btn/lg-share-en.gif" width="125" height="16" alt="Bookmark and Share" style="border:0"/></a><script type="text/javascript" src="http://s7.addthis.com/js/200/addthis_widget.js"></script>
<!-- AddThis Button END -->

http://www.fckeditor.net/forums/viewtopic.php?f=6&t=13465

Looks like the AdSense code is having all its line breaks converted to BR's. Some CMS packages let you turn that off. If you can't, just rework the AdSense code so it's all on one line within the script tags (take out all the comments and line breaks).

It's also helpful to put your AdSense and other Javascript code within a table or something long those lines so you can see where it is when editing, otherwise it's easy to delete by accident.