//todo: need to support 2 ad panels on same page with .each

$(document).ready(
	function($)
	{
        var NoOfImages = $('div.advert>span.ad').length;
        $('span.ad').css('display','block');
        $('span.ad:gt(0)').hide();

        var timer = setInterval( showAd, 15000);
		
        var counter = 1;
		showAd();

        function showAd() {
            //if (counter ==0) { counter++; return; }
            //console.log($('span.ad:eq(0) img').css('height'));
            $('span.ad')
              .stop()
              .hide()
              .filter('span.ad:eq(' + (counter - 1) + ')').show(); 
            counter == NoOfImages ? counter = 1 : counter++; 
        }
    });