function GetRecentTopics()  
{  
  $.ajax({  
      url: "rec.php", 
      timeout: 10000, 
      cache: false,  
      success: function(html){  
           $("#RecentTopics").html(html);  
       }  
   });  
}  
$(document).ready(function(){  
   GetRecentTopics();  
   setInterval('GetRecentTopics()',60000);  
});