// Header Javascript v1.00

// Validate domain name
function validate_domain_name(txtBoxId) {
  var domainNamesTextBox = document.getElementById(txtBoxId);
  if (domainNamesTextBox != null) {
    if (domainNamesTextBox.value.length <= 0) {
      alert('Please enter a domain name.');
      return false;
    }
    else {
      var regExInvalidChars = /[^a-zA-Z0-9-\s.]+/;
      var isInvalid = regExInvalidChars.test(domainNamesTextBox.value);
      if (isInvalid) {
        alert('Invalid character in domain. Only letters, numbers or hyphens are allowed.');
        return false;
      }
    }
  }
  return true;
}