Форум

<script type="text/javascript">
$('.red').click(function()
        {
            var price_id = $(this).parent().find('.price_id').text();
            $.ajax({url:'/index.php',
                data: ({price_id:price_id}),
                dataType: 'json',
                                success: function(bookmarkstext)
                                { $('.red').html(bookmarkstext); }
            });
            return false;
        });
</script>

   if($_REQUEST['__ajax'] == 'Y')
   {
      $APPLICATION->RestartBuffer();
         // обработка ajax запроса
         echo '<pre>', print_r($_REQUEST).'</pre>';
      die();
   }
   else // тут все остальное
   {
      <?$APPLICATION->IncludeComponent("bitrix:news", "mainnews", ...... 
   }

   

   $.get("/index.php", { 'price_id': 'price_id', '__ajax':'Y'}, 
       function(data)
       { 
            alert(data);
       }
        );