How to Add keyword density and keyword highlight to admin bar (from: http://wpsnipp.com/index.php/functions-php/add-keyword-density-and-keyword-highlight-to-admin-bar/)

add_keyword_density_to_admin_bar.php

<?php
function keyword_density_js(){
?>
<script src="<?php bloginfo('template_url'); ?>/js/jquery.js" type="text/javascript"></script>
<script type="text/javascript" src="<?php bloginfo('template_url'); ?>/js/jquery.wordstats.js"></script>
<script type="text/javascript" src="<?php bloginfo('template_url'); ?>/js/jquery.wordstats.en.js"></script>
<script type="text/javascript" src="<?php bloginfo('template_url'); ?>/js/highlight.js"></script> 
<script type="text/javascript">
      jQuery(document).ready(function(){
                        var count = 8;
                        $.extend(jQuery.wordStats.stopWords, {'retrieved': true, '2007': true});
                        $.wordStats.computeTopWords(count);
                        var msg = '';
                for(var i = 0, j = $.wordStats.topWords.length; i < j && i <= count; i++) {
                        msg += '<li><a href="#" class="remove" onclick="$(\'#content\').highlight(\''+$.wordStats.topWords[i].substring(1)+'\');"><span id="ab-updates" class="update-count">' + $.wordStats.topWeights[i] + '</span> - ' + $.wordStats.topWords[i].substring(1) + '</a></li>';
                }
                        $('#wp-admin-bar-keyword_style ul').html(msg);
                        $.wordStats.clear();
                });
</script>
<style>.highlight { background-color:yellow;color:#333 !important; }</style>
<?
} add_action( 'wp_head','keyword_density_js' );


function keyword_density_adminbar() {
        global $wp_admin_bar;
        $keyword_density ='<div id="keyword_stats">error!</div>';

        $wp_admin_bar->add_menu( array(
        'id' => 'keyword_style',
        'title' => __('Keyword Density'),
        'href' =>  admin_url( '#')
    ) );

        $wp_admin_bar->add_menu( array(
        'parent' => 'keyword_style', 
        'id' => 'keyword_style',
        'title' => $keyword_density,
        'href' =>  admin_url('#')
    ) );
}
add_action( 'wp_before_admin_bar_render', 'keyword_density_adminbar' );