$(document).ready(function(){ 
    if($("#four-pillars").length > 0){
    	setTimeout("rotateImage()", 8000);
    }
});
var promo_key;
var last_key = promo_key;
function rotateImage(){
	if(promo_max > 1){
		promo_key = Math.floor(Math.random() * (promo_max));
		while(last_key == promo_key){
			promo_key = Math.floor(Math.random() * (promo_max)); 
		}
		last_key = promo_key;

		$("#four-pillars a img").fadeOut("slow", function(){
			$("#four-pillars a img").attr('src', '/promos/'+promo[promo_key]['promo_group_id']+'/'+promo[promo_key]['filename']);
			$("#headline p").html("<strong>"+promo[promo_key]['title']+"</strong> "+promo[promo_key]['description']);
			$("#headline a").attr('href', promo[promo_key]['link']);
			$("#four-pillars a img").fadeIn("slow");
		});
		setTimeout("rotateImage()", 8000);	
	}
}