jQuery(document).ready(function()
 {
 
 var copnr=jQuery.cookie("copertinanr")+"";
 var rndNum; 
  if(isNaN(copnr))
  {
	 								rndNum=Math.floor(Math.random()*5); 
   }else
   {
                rndNum=parseInt(copnr);
   }

var indexCop=rndNum+1;
if(indexCop>5)indexCop=1;   
jQuery.cookie("copertinanr", indexCop, { expires: 6 });   
jQuery("#bgrCopertina").css("background","url(images/0"+indexCop+".jpg)");
jQuery("#bgrCopertina1").css("background","url(images/0"+indexCop+"_1.jpg)");
 //jQuery("#bgrCopertina").text(indexCop);
 })