function once(command,id,interval){
  var mul = interval.substring(0,interval.indexOf(" "));
  mul = parseInt(mul);
  interval = interval.substring(interval.lastIndexOf(" ")+1,interval.length);
  if (interval == "secondi"){ e = 1000; }
  else if (interval == "minuti"){ e = 60000; }
  else if(interval == "ore"){ e = 3600000; }
  else if (interval == "giorni"){ e = 86400000; }
  e = e * mul;
  var now = new Date();
  var ex = new Date();
  ex.setTime(now.getTime() + e);
  if (!getCookie(id)){
    eval(command);
    setCookie(id,"1",ex);
    }
  }

function setCookie(name, value, expire){
  document.cookie = name + "=" + escape(value) + ((expire ==null) ? "" : ("; expires=" + expire.toGMTString()));
}



function getCookie(Name){
   var search = Name + "=";
  if (document.cookie.length > 0){
    offset = document.cookie.indexOf(search);
    if (offset != -1){
      offset += search.length;
      end = document.cookie.indexOf(";", offset);
      if (end == -1) {
        end = document.cookie.length;
        }
      return unescape(document.cookie.substring(offset, end));
      }
      else
      {
      return "";
      }
    }
    else
    {
    return "";
  }
}

once("window.open('http://www.job7.ch/popup.html', 'popup', 'width=600,height=600,scrollbars=yes,resizable=yes'); focus();","popup", "4 ore");