function renderCart() {
  var xmlHttp = getXmlHttpObj();
  xmlHttp.onreadystatechange=function()
    {
       if(xmlHttp.readyState!=4) {
         return;
       }
       var cartDiv = document.getElementById("topbar_cartdiv");
       var cartData = xmlHttp.responseText;
       var separatorPos = cartData.indexOf(";");
       var prodCount = cartData.substr(0, separatorPos);
       var euros = cartData.substr(separatorPos+1);
       var  newHtml = "<img src='/img/uis/transparent.gif' width='5' height='8'>";
       if(prodCount > 0) {
          newHtml = prodCount +" tuotetta / " +euros +" &euro;";
       } else {
       }
       cartDiv.innerHTML = newHtml;
       setPaymentLink();
    }
  var randomnumber=Math.random()*1103003;
  var url = selfUrl +"/index.jsp?action=ajax_shoppingcart&r=" +randomnumber;
//alert("url: " +url);
  xmlHttp.open("GET",url,true);
  xmlHttp.send(null);
}