var bikky = document.cookie;
var today = new Date();
var expiry = new Date(today.getTime() + 60 * 24 * 60 * 60 * 1000);

function setCookie(name, value)
{ // use: setCookie("name", value);
   if (value != null && value != "")
      document.cookie=name + "=" + escape(value) + "; expires=" + expiry.toGMTString();
   bikky = document.cookie; // update bikky
}

function imposta()
{
var nextyear = new Date();
nextyear.setFullYear(nextyear.getFullYear() +1);
setCookie ("version", document.lastModified);
setCookie ("provenienza", document.referrer);
setCookie ("lang", navigator.language);
setCookie ("os", navigator.platform);
}