In response to Matt, another way to submit the form data is, instead of the JSON, you could call $('#form').serialize() in the 'data' field of the jQuery.ajax function. This would eliminate the need for a plugin.

Also, I'm not an expert on this subject, still trying to learn it myself, but is it necessary to have both a POST and GET request when you could insert the response from ASP.NET MVC into the page instead? This would result in one request. There might be a valid reason for that approach though. I guess mine would look like this:

// The Controller Action should return a PartialView as response,

// so just a user control that contains the comments.

function PostComment(targetUserID, commenterUserID, comment)

jQuery.ajax({

type: 'POST',

data: $('#commentForm').serialize(),

url: 'Comments/Add',

success: function(result){

$('#comments').html(result);

}

}

});