// name - name of the cookie
// value - value of the cookie
// * an argument defaults when it is assigned null as a placeholder
// * a null placeholder is not required for trailing omitted arguments
function setCookie(name, value, expires, path, domain, secure) {
  var curCookie = name + "=" + value +
    ((expires) ? "; expires=" + expires.toGMTString() : "") +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}

// name - name of the desired cookie
// * return string containing value of specified cookie or null if cookie does not exist
function getCookie(name) {
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else {
    begin += 2;
  }
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return dc.substring(begin + prefix.length, end);
}

var referrer = getCookie("ShopSiteReferer");
//If there is no cookie create one
if (!referrer) {
  // create an instance of the Date object
  var now = new Date();
  // cookie expires in 14 days
  // 14 days * 24 hours * 60 minutes * 60 seconds * 1000 milliseconds
  now.setTime(now.getTime() + 14 * 24 * 60 * 60 * 1000);

  var referrer = "NONE";
  // If referrer is not empty get it.
  if (document.referrer != "") {
    referrer = document.referrer;
  }

  // set the new cookie
  setCookie("ShopSiteReferer", referrer, now, "",".shopsite.com");
}