Using Joomla 2.5.8 Metamod 3-13b

I want to show adsense only when i am in a category and not in the listing self. I have used the advanced debugging to get the code working for a category. As per the code below when i am in category 2274 - it displays the adsense code and that is working fine.

i am stugling to change the code that if i am in catecory 2274 or 2275 or 2276 that the code must be displayed - i have tried to put '2274, 2275, 2276' in place of the '2274' but that does not work and then nothing displays - could you please help me to get the OR statement working.

if ( $option == 'com_mtree' and $Itemid == '176' and $jinput->get('task') == 'listcats' ) {
    if ( $jinput->get('cat_id') == '2274' ) {
        ?>
        <script type="text/javascript">
var googletag = googletag || {};
googletag.cmd = googletag.cmd || [];
(function() {
   var gads = document.createElement("script");
   gads.async = true;
   gads.type = "text/javascript";
   var useSSL = "https:" == document.location.protocol;
   gads.src = (useSSL ? "https:" : "http:") + "//www.googletagservices.com/tag/js/gpt.js";
   var node =document.getElementsByTagName("script")[0];
   node.parentNode.insertBefore(gads, node);
  })();
</script>


<div id="div-gpt-ad-1356898040075-1">
  <script type='text/javascript'>
    googletag.cmd.push(function() {
      googletag.defineSlot('/13259005/at_Knysna_All_TopRight_250x250', [250, 250], 'div-gpt-ad-1356898040075-1')
        .addService(googletag.pubads())
        .setTargeting("Directory", "Accommodation");
      googletag.enableServices();
      googletag.display('div-gpt-ad-1356898040075-1');
  });
  </script>
</div>

<div id="div-gpt-ad-1356898040075-0">
  <script type='text/javascript'>
    googletag.cmd.push(function() {
      googletag.defineSlot('/13259005/at_Knysna_All_BotRight_250x250', [250, 250], 'div-gpt-ad-1356898040075-0')
        .addService(googletag.pubads())
        .setTargeting("Directory", "Accommodation");
      googletag.enableServices();
      googletag.display('div-gpt-ad-1356898040075-0');
  });
  </script>
</div>
        <?php
    }
}