Marketo Embedded Form Custom Validators

// from https://codepen.io/Evangogh/pen/VjaRQV

MktoForms2.loadForm("//app-ab06.marketo.com", "981-LQX-968", 3668);
MktoForms2.whenReady(function(form) {
  form.onValidate(function(builtInValid) {
    if (!builtInValid) return;
    form.submittable(true);
    var vals = form.vals();
    var invalidDomains = ["gmail.cm", "gmail.co",
        "gmail.om", "yahoo.cm", "yahoo.co", "yahoo.om",
        "hotmail.cm", "hotmail.co", "hotmail.om",
        "outlook.cm", "outlook.co", "outlook.om",
        "aol.cm", "aol.co", "aol.om"
      ],
      emailExtendedValidationError =
      'Please enter a valid email address.',
      emailField = 'Email',
      emailFieldSelector = '#' + emailField;
    var invalidDomainRE = new RegExp('@(' + invalidDomains.join(
      '|') + ')$', 'i');
    if (invalidDomainRE.test(form.vals()[emailField])) {
      form.showErrorMessage(emailExtendedValidationError,
        form.getFormElem().find(emailFieldSelector)
      );
      form.submittable(false);
    }
    var emailRegExp =
      /^[^\s@]+@([^\s@.,]+\.)+[^\s@.,]{2,}$/;
    var validEmail = emailRegExp.test(vals.Email);
    if (!validEmail) {
      form.showErrorMessage(emailExtendedValidationError,
        form.getFormElem().find(emailFieldSelector)
      );
      form.submittable(false);
    }
    var phoneRegExp = 
	/^[+]*[(]{0,1}[0-9]{1,4}[)]{0,1}[-\s\./0-9]*$/g;
    var validPhone = phoneRegExp.test(vals.Phone);
    phoneExtendedValidationError =
      'Please enter a valid phone number.',
      phoneField = 'Phone',
      phoneFieldSelector = '#' + phoneField;
    if ((vals.Phone.length < 10) || (vals.Phone.length >
        20) || (vals.Phone == "0123456789") || (vals.Phone ==
        "1234567890") || (vals.Phone == "9876543210") ||
      (vals.Phone == "0987654321") || (!validPhone)) {
      form.submittable(false);
      var businessphone = form.getFormElem().find(
        "#Phone");
      form.showErrorMessage(
        "Please enter a valid phone number.",
        businessphone);
    }
    var invalidPhoneRE = /^\d*?(\d)\1{5,}\d*$/;
    if (invalidPhoneRE.test(form.vals()[phoneField])) {
      form.showErrorMessage(phoneExtendedValidationError,
        form.getFormElem().find(phoneFieldSelector)
      );
      form.submittable(false);
    } else {
      form.submittable(form.submittable() !== false);
    }
  });
  form.onSubmit(function(form) {
    alert("Success!");
  });
});