save all UTM paremeters as cookies

function saveUTMParameters() {
  // read all UTM parameters
  var utm_source = getQueryVariable('utm_source');
  var utm_medium = getQueryVariable('utm_medium');
  var utm_term = getQueryVariable('utm_term');
  var utm_content = getQueryVariable('utm_content');
  var utm_campaign = getQueryVariable('utm_campaign');
  
  // save them as cookies
  Cookies.set('utm_source', utm_source);
  Cookies.set('utm_medium', utm_medium);
  Cookies.set('utm_term', utm_term);
  Cookies.set('utm_content', utm_content);
  Cookies.set('utm_campaign', utm_campaign);
}