Crea una aplicación que valide datos mediante una planilla excel

ript
function validate(form) {
  var errors = [];
  var firstName = form.firstName.value;
  var lastName = form.lastName.value;
  var email = form.email.value;
  var password = form.password.value;
  var passwordConfirm = form.passwordConfirm.value;

  if (firstName == "") {
    errors.push("First name