Fetch most recent tweet for declared username

recent-tweet.js

/**
* Fetch Most Recent Tweet
* @author: Rachel Baker
*
* Fetches most recent tweet for a declared username and displays returned data
*
*
*/
jQuery(document).ready(function($) {
    // Declare twitter username here
    var twitterUser = 'rachelbaker';

    // Enable caching
    $.ajaxSetup({
        cache: true
    });

    // Send JSON request
    $.getJSON("https://api.twitter.com/1/statuses/user_timeline.json?include_entities=true&exclude_replies=true&include_rts=false&screen_name=" + twitterUser + "&count=1&callback=?", function(data) {

        $.each(data, function(i, item) {
            // Calculate how many hours ago tweet was posted
            var dateTweet = new Date(item.created_at);
            var dateNow = new Date();
            var dateDiff = dateNow - dateTweet;
            var hours = Math.round(dateDiff / (1000 * 60 * 60));


            var tweetTime = "<timedate><a href='http://www.twitter.com/" + twitterUser + "/status/" + item.id_str + "''>" + hours + " hours ago</a></timedate>";
            var tweetData = "<p>" + item.text + "</p>";
            $('#tweet').append(tweetData);
            $('span.time').append(tweetTime);
            $('#username').append("@" + twitterUser);

        });


    });
});

Example HTML for inserting tweet:

<div id="tweet-container">
 <h6 id="username">@rachelbaker <span class="time"></span></h6>
<div id="tweet"></div>
</div><!--/#tweet-container -->