Random Ads Codes

[Skavenger]

Hi, actually I'm using Google Adsense, but I want too put another code from another web in the same 'box' [table], I need that the two codes change randomly when the user load the page, or maybe with o conditional...

This is the code I'm using now

<!-- Start Google AdSense -->
<div>
<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="1" border="0" width="100%" align="center">
<tr>
    <td class="thead">$vbphrase[google_ad_advert]</td>
</tr>
<tr>
    <td class="alt2">
<center>
<table width="100%" height="60" border="0">
  <tr>
    <td width="100%"><div align="center">
    <script type="text/javascript"><!--
    google_ad_client = "pub-8473163217242949";
    google_ad_width = 468;
    google_ad_height = 60;
    google_ad_format = "468x60_as";
    google_ad_type = "text_image";
    google_ad_channel = "";
    google_color_border = "000000";
    google_color_bg = "242f37";
    google_color_link = "FFFFFF";
    google_color_text = "CCCCCC";
    google_color_url = "FFFFFF";
    //--></script>
    <script type="text/javascript"
    src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
    </script>
    </div></td>
  </tr>
</table>
</div>
</center>
    </td>
</tr>
</table> 
<br />
<!-- End Google AdSense -->

This is the other code I need to put

<script  language="javascript"  type="text/javascript"  >
iw_ad_cliente='3fc703661503434d7524267dfdd3e668';
iw_ad_pagina=20198;
iw_ad_cod=10187;
iw_ad_tm=5;
iw_ad_ancho=468;
iw_ad_alto=60;
iw_ad_formato='ad_468x60';
iw_ad_cad='8bd8c01b091dfda37a2cd0a475d619b2';
iw_ad_tipo=1;
iw_ad_tipocod=5;
iw_ad_modo=1;
impresionesweb_color_titulo='#FFFFFF';
impresionesweb_color_cuerpo='#CCCCCC';
impresionesweb_color_fondo='#242f37';
impresionesweb_color_url='#FFFFFF';
impresionesweb_color_borde='#000000';
</script>
<script language="javascript" src="http://www.impresionesweb.com/r/banner_iw.php?idrotador=20198&tamano=468x60"></script>