Do not Display Adsense for specific categories

[Sureshkumar]

HI Folk,

I have been using below adsense block under my forum navbar. This block will display through out entire forum.

I do not want to display this ad block for specific categories & all threads under it, Even for guests also.

How to achieve this ?

<if condition="$show['guest']">

<table border="0" width="56%" id="table1">
<tr>

<td align="left">

<script type="text/javascript"><!--
google_ad_client = "pub-xxxxxxxxx";
/* 300x250, created x/xx/09 */
google_ad_slot = "xxxxxx";
google_ad_width = 300;
google_ad_height = 250;
//-->
</script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script></td>

<td align="left">

<script type="text/javascript"><!--
google_ad_client = "pub-xxxxxxxxx";
/* 300x250, created x/xx/09 */
google_ad_slot = "xxxxxx";
google_ad_width = 300;
google_ad_height = 250;
//-->
</script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script></td>

</tr>
</table>

</if>

Thanks in Advance.

Surya.

[Sureshkumar]

Any help ?