function initTwitterFeed() {
    var accountName = "explorica";
    if ((TwitterAccountName !== "") && (TwitterAccountName !== null)) {
        accountName = TwitterAccountName;
    }
    var h = document.getElementsByTagName("head")[0];
    var s = document.createElement("script");
    s.type = "text/javascript";
    s.src = String.format(document.location.protocol + "//api.twitter.com/1/statuses/user_timeline.json?screen_name={0}&count=5&callback=renderTwitterFeed", accountName);
    //s.src = "http://twitter.com/statuses/user_timeline/explorica.json?count=1&callback=renderTwitterFeed";
    h.appendChild(s);
}

function renderTwitterFeed(twitters) {
    var statusHTML = [];
    for (var i = 0; i < 1; i++) {
        var username = twitters[i].user.screen_name;
        var status = ((twitters[i].text.length > 120) ? twitters[i].text.substr(0, 120) + "..." : twitters[i].text).replace(/((https?|s?ftp|ssh)\:\/\/[^"\s\<\>]*[^.,;'">\:\s\<\>\)\]\!])/g, function (url) {
            return '<a href="' + url + '">' + url + '</a><br/>';
        }).replace(/\B@([_a-z0-9]+)/ig, function (reply) {
            return reply.charAt(0) + '<a href="http://twitter.com/' + reply.substring(1) + '">' + reply.substring(1) + '</a>';
        });
        statusHTML.push('<li><span>' + status + '</span> <a style="font-size:85%" href="http://twitter.com/' + username + '/status/' + twitters[i].id_str + '">' + relative_time(twitters[i].created_at) + '</a></li>');
    }
    $get('twitter_update_list').innerHTML = statusHTML.join('');
    $get("twitter_loading").style.display = "none";
    $get("twitter_div").style.display = "";
}

function relative_time(time_value) {
    var values = time_value.split(" ");
    time_value = values[1] + " " + values[2] + ", " + values[5] + " " + values[3];
    var parsed_date = Date.parse(time_value);
    var relative_to = (arguments.length > 1) ? arguments[1] : new Date();
    var delta = parseInt((relative_to.getTime() - parsed_date) / 1000);
    delta = delta + (relative_to.getTimezoneOffset() * 60);

    if (delta < 60) {
        return 'less than a minute ago';
    } else if (delta < 120) {
        return 'about a minute ago';
    } else if (delta < (60 * 60)) {
        return (parseInt(delta / 60)).toString() + ' minutes ago';
    } else if (delta < (120 * 60)) {
        return 'about an hour ago';
    } else if (delta < (24 * 60 * 60)) {
        return 'about ' + (parseInt(delta / 3600)).toString() + ' hours ago';
    } else if (delta < (48 * 60 * 60)) {
        return '1 day ago';
    } else {
        return (parseInt(delta / 86400)).toString() + ' days ago';
    }
}