// This function sets the referrer tracking cookie with the following
// data values:
//
// url    - the URL of the referring site
// search - the entire search string, unparsed 
// time   - the user's local timestamp
//
// The cookie is set only if the location.search string is non-null,
// which indicates a referral from a search engine.
//
function setReferrerTrack()
{
  return true;
}