function displayError(message) {
    var board = document.getElementById('board');
    board.scrollIntoView();

    // Make it invisible.
    YAHOO.util.Dom.setStyle('board', 'opacity', 0.0);

    // Add message.
    board.innerHTML = '<div class="error">' + message + '</div>';

    // And make it appear.
    var anim = new YAHOO.util.Anim('board', { opacity: { to: 1.0} }, 1, YAHOO.util.Easing.easeOut);
    anim.animate();
}

function displayMessage(message) {
    var board = document.getElementById('board');
    board.scrollIntoView();

    // Make it invisible.
    YAHOO.util.Dom.setStyle('board', 'opacity', 0.0);

    // Add message.
    board.innerHTML = '<div class="message">' + message + '</div>';

    // And make it appear.
    var anim = new YAHOO.util.Anim('board', { opacity: { to: 1.0} }, 1, YAHOO.util.Easing.easeOut);
    anim.animate();
}