var messageDelay = 1000;  // How long to display status messages (in milliseconds)

// Init the form once the document is ready
$( init );


// Initialize the form

function init() {
  // Make submitForm() the form's submit handler.
  // Position the form so it sits in the centre of the browser window.
  $('#contactForm').show().submit( submitForm ).addClass( 'positioned' );
}

// Submit the form via Ajax

function submitForm() {
  var contactForm = $(this);

  // Are all the fields filled in?

  if ( !$('#inputName').val() || !$('#inputEmail').val() || !$('#inputComments').val() ) {

    // No; display a warning message and return to the form
    $('#incompleteMessage').fadeIn().delay(messageDelay).fadeOut();
    contactForm.fadeOut().delay(messageDelay).fadeIn();

  } else {

    // Yes; submit the form to the PHP script via Ajax

    $('#sendingMessage').fadeIn();
    contactForm.fadeOut();

    $.ajax( {
      url: contactForm.attr( 'action' ) + "?ajax=true",
      type: contactForm.attr( 'method' ),
      data: contactForm.serialize(),
      success: submitFinished
    } );
  }

  // Prevent the default form submission occurring
  return false;
}


// Handle the Ajax response

function submitFinished( response ) {
  response = $.trim( response );
  $('#sendingMessage').fadeOut();

  if ( response == "success" ) {

    // Form submitted successfully:
    // 1. Display the success message
    // 2. Clear the form fields
    // 3. Fade the content back in

    $('#successMessage').fadeIn().delay(messageDelay).fadeOut();
    $('#inputName').val( "" );
    $('#inputEmail').val( "" );
    $('#inputComments').val( "" );

    $('#content').delay(messageDelay+500).fadeTo( 'slow', 1 );
	$('#contactForm').fadeIn();

  } else {

    // Form submission failed: Display the failure message,
    // then redisplay the form
    $('#failureMessage').fadeIn().delay(messageDelay).fadeOut();
    $('#contactForm').delay(messageDelay+500).fadeIn();
  }
}