var expdate = new Date ();
expdate.setTime (expdate.getTime() + (1000 * 60 * 60 * 24 * 183));
var ref = document.referrer;
if (!ref) ref = "NA";

function setCookie (name, value, expires) {
if (!expires) expires = new Date();
document.cookie = name + "=" + escape (value) +  
"; expires=" + expires.toGMTString() +  "; path=/";
}

function getCookie (name) {
var dcookie = document.cookie; 
var cname = name + "=";
    var clen = dcookie.length;
    var cbegin = 0;
        while (cbegin < clen) {
        var vbegin = cbegin + cname.length;
            if (dcookie.substring(cbegin, vbegin) == cname) { 
            var vend = dcookie.indexOf (";", vbegin);
                if (vend == -1) vend = clen;
            return unescape(dcookie.substring(vbegin, vend));
            }
        cbegin = dcookie.indexOf(" ", cbegin) + 1;
            if (cbegin == 0) break;
        }
    return null;
}

function preveri() {
if (!(getCookie('from'))) setCookie('from',ref,expdate);
}