startCookie=document.cookie.indexOf("ciastko");

if (startCookie==-1) 
{

  var waznosc=new Date();
  var tresc='pop';
  tresc = escape(tresc);
  waznosc.setTime(waznosc.getTime()+60*60*24*1);
  
    document.write('<div id="popup">');
    document.write('<div id="close"> <a href="#"><img src="/pop/images/close-pop.gif" alt="zamknij reklamę" title="zamknij reklamę"></a> </div>');
    document.write('<img src="/pop/images/pop1.gif">');
    document.write('</div>');
        
  document.cookie="ciastko=" + tresc + ";expires=" + waznosc.toGMTString();
  
}