var initValue = 'Search'; 
function clearSearch() {
  var FormName = document.FA_Search;
  if (FormName.q.value == initValue) {
    FormName.q.value = '';
  }
} 

function validateSearch() {
  var FormName = document.FA_Search;
  if ( FormName.q.value == '' || FormName.q.value.toLocaleLowerCase() == initValue.toLocaleLowerCase() ) {
    alert('Please enter at least one keyword in the Search box.');
    FormName.q.focus();
    return false;
  }
  return true;
}