function commentAdded(request) {
  	$('errors').innerHTML = "";
	new Effect.BlindDown($('commentlist').lastChild);
  	$('comment').value = '';
  	$('comment').focus();
}

function failure(request) {
  	$('errors').innerHTML = request.responseText;
  	new Effect.Highlight('errors');
}

function loading() {
  	$('submit').disabled = true;
  	Element.show('comment_loading');
}

function complete(request) {
  	Element.hide('comment_loading');
  	Element.show('commentform');
  	$('submit').disabled = false;  
	$('TextDisplay').innerHTML = "";

  	if (request.status == 200) {commentAdded()}
  	else {failure(request)};
}