function qcheck(form) {
  var missing = '';
  var err = 0;
  if (form.username.value.length == 0) {missing = 'user name'; err = 1;}
  if (form.password.value.length == 0) {
    if (missing != '') {missing = missing + ' and password'; err = 1;}
    else {missing = missing + 'password'; err = 1;}
  }
  if (err == 1) {
    alert("Please fill in your " + missing + ".");
    return false;
  }
}