Comment postback for ajax commenting

// AJAXified commenting system
jQuery('document').ready(function($){
    var commentform=$('#commentform'); // find the comment form
    var respond=jQuery('#respond');
    jQuery('<div id="comment-status" ></div>').insertBefore(respond); // add info panel before the form to provide feedback or errors
    var statusdiv=$('#comment-status'); // define the infopanel

    commentform.submit(function(){
            //serialize and store form data in a variable
            var formdata=commentform.serialize();

            //Add a status message
            statusdiv.html('<p>Processing...</p>');
            //Extract action URL from commentform
            var formurl=commentform.attr('action');
            //Post Form with data
            $.ajax({
                type: 'post',
                url: formurl,
                data: formdata,
                error: function(XMLHttpRequest, textStatus, errorThrown){
                    statusdiv.html('<p class="ajax-error" >You might have left one of the fields blank, or be posting too quickly</p>');
                },
                success: function(data, textStatus){
                    if(data=="success"){
                        var commenttext =  jQuery('#comment').val();
                        jQuery('<li class="comment">'+commenttext+'</li>').insertBefore(respond);
                        statusdiv.html('<p class="ajax-success" >Thanks for your comment. We appreciate your response.</p>');
                    }
                    else
                    {
                        statusdiv.html('<p class="ajax-error" >Please wait a while before posting your next comment</p>');
                    }
                    commentform.find('textarea[name=comment]').val('');
                }
            });
            return false;

    });
});