var messageDelay = 5000;

function submitForm() {
  var contactForm = $(this);
  contactForm.fadeOut(function(){
    $('#sendingMessage').fadeIn();
  });
  $.ajax( {
    url: contactForm.attr( 'action' ),
    type: contactForm.attr( 'method' ),
    data: contactForm.serialize(),
    success: submitFinished
  } );
  // Prevent the default form submission occurring
  return false;
}

function submitFinished(response) {
  response = $.trim( response );
  $('#sendingMessage').fadeOut(function(){
    if (response == 'success') {
      $('input[name=name],input[name=email],input[name=phone],textarea[name=text]').val('');
      $('#successMessage').fadeIn().delay(messageDelay).fadeOut(function(){
        $('#contactForm').fadeIn();
      });
    } else {
      $('#failureMessage').fadeIn().delay(messageDelay).fadeOut(function(){
        $('#contactForm').fadeIn();
      });
    }
  });
}