var validationSet = {
  'name': {
    'regexp': /^.+?/,
    'error': 'Name is required. '
  },
  'message_subject': {
    'regexp': /^.+?/,
    'error': 'Subject is required. '
  },
  'message': {
    'regexp': /^.+?/,
    'error': 'Message is required. '
  },
  'email': {
    'regexp': /^[A-Za-z0-9._%-]+@[A-Za-z0-9-]+\.[A-Za-z]{2,4}$/,
    'error': 'A valid Email Address is required. '
  }
};