function setFocus() {
  document.forms[0].query.focus();
  document.forms[0].query.select();
}
function clearForm() {
  document.forms[0].query.defaultValue = '';
  document.forms[0].query.value = '';
  setFocus();
}
function chkQuery() {
  if (document.forms[0].query.value.match(/[a-z]/i)) return true;
  setFocus();
  return false;
}