var z = _uGC(document.cookie, '__utmz=', ';');
var source  = _uGC(z, 'utmcsr=', '|');
var gclid   = _uGC(z, 'utmgclid=', '|');
if (gclid !="-") { 
      source = 'google'; 
} 
function populateHiddenFields(f) { 
      document.getElementById('Source').value  = source;
      return true; 
}